test: add verification script for ENABLE_TESTS mechanism

Created tests/verify-enable-tests.sh to verify that the ENABLE_TESTS environment variable correctly controls test code inclusion: - Production build (no ENABLE_TESTS): excludes test-content-script.js, background.js has if (false) for test code - Test build (ENABLE_TESTS=true): includes test-content-script.js, background.js has if (true) for test code Script verifies both scenarios and provides clear pass/fail output. Verified: both production and test builds work as expected. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
refactor: make test code conditional via ENABLE_TESTS env var
2025-10-27 17:01:01 +00:00 · 2025-10-27 15:21:03 +00:00 · 2025-10-26 18:13:48 +01:00 · 2025-10-26 18:10:43 +01:00 · 2025-10-26 18:07:33 +01:00 · 2025-10-26 18:05:24 +01:00
17 changed files with 1092 additions and 20 deletions
--- a/.dockerignore
+++ b/.dockerignore
@ -0,0 +1,16 @@
+.log
+node_modules
+sidebar.js
+web-ext-artifacts/
+lib/*
+yarn-error.log
+rentgen.zip
+
+# Generated PNG icons (build artifacts)
+assets/icons/*.png
+assets/icon-addon-*.png
+
+# Exception: do not ignore the `browser-api` directory inside `lib`
+!/lib/browser-api/
+
+Dockerfile
--- a/.gitignore
+++ b/.gitignore
@ -2,6 +2,7 @@
 node_modules
 sidebar.js
 /web-ext-artifacts/
+/artifacts/
 lib/*
 /yarn-error.log
 /rentgen.zip
@ -12,3 +13,5 @@ lib/*

 # Exception: do not ignore the `browser-api` directory inside `lib`
 !/lib/browser-api/
+
+.claude
--- a/111
+++ b/111
@ -0,0 +1,111 @@
+# Rentgen Browser Extension - Docker Build
+# See README.md for detailed usage instructions
+
+# Build stage
+FROM node:lts AS builder
+
+WORKDIR /app
+
+# Copy package files for dependency installation (better layer caching)
+COPY package.json package-lock.json ./
+
+# Install dependencies
+RUN npm install
+
+# FIXME: COPY . . invalidates cache, so we need to optionally install Firefox
+# and jump back to the correct stage. It might be too complex though, so we
+# either need to use build args (if cache properly) or heavily document the
+# stage transitions, maybe even with a graph.
+
+# Copy source code (respecting .dockerignore)
+COPY . .
+
+# Build the extension for Firefox (default) - without tests
+RUN npm run build
+
+# Create the package
+RUN npm run create-package
+
+# Test builder stage - builds with ENABLE_TESTS=true
+FROM node:lts AS test_builder
+
+WORKDIR /app
+
+# Copy package files for dependency installation
+COPY package.json package-lock.json ./
+
+# Install dependencies
+RUN npm install
+
+# Copy source code
+COPY . .
+
+# Build with tests enabled
+RUN ENABLE_TESTS=true npm run build
+
+# Create the package
+RUN npm run create-package
+
+# Code quality stage - for running quality checks
+FROM builder AS code_quality
+RUN npm run typecheck && npm run lint
+
+# Artifacts stage - only contains the built artifacts (for --output)
+FROM scratch AS artifacts
+
+# Copy only the built extension zip file to root
+COPY --from=builder /app/web-ext-artifacts/*.zip /
+
+# Default stage - full development environment
+FROM builder
+
+# Default command shows the built artifact
+CMD ["ls", "-lh", "/app/web-ext-artifacts/"]
+
+# Runtime stage - for running extension in Firefox
+FROM node:lts AS runtime
+
+WORKDIR /app
+
+# Copy built extension from test_builder (includes test code)
+COPY --from=test_builder /app /app
+
+# Install Firefox and Xvfb for headless execution (cached layer)
+RUN apt-get update && apt-get install -y \
+    firefox-esr \
+    xvfb \
+    procps \
+    && rm -rf /var/lib/apt/lists/*
+
+# Install Python and pip in a separate layer for better caching
+RUN apt-get update && apt-get install -y \
+    python3-pip \
+    wget \
+    && rm -rf /var/lib/apt/lists/*
+
+# Install geckodriver for WebDriver protocol
+RUN wget -q https://github.com/mozilla/geckodriver/releases/download/v0.34.0/geckodriver-v0.34.0-linux64.tar.gz \
+    && tar -xzf geckodriver-v0.34.0-linux64.tar.gz \
+    && mv geckodriver /usr/local/bin/ \
+    && rm geckodriver-v0.34.0-linux64.tar.gz \
+    && chmod +x /usr/local/bin/geckodriver
+
+# Install Python dependencies for testing
+RUN pip3 install --break-system-packages marionette_driver
+
+# Set display for Xvfb
+ENV DISPLAY=:99
+
+# Start script (not used in verify stage)
+CMD ["echo", "Use verify stage for testing"]
+
+# Integration test stage - automated testing with exit code
+FROM runtime AS integration_test
+
+# Copy verification scripts
+COPY tests/test_verify.py /app/tests/test_verify.py
+COPY tests/test-lib.js /app/tests/test-lib.js
+RUN chmod +x /app/tests/test_verify.py
+
+# Run verification and exit with proper exit code
+CMD ["python3", "/app/tests/test_verify.py"]
--- a/background.ts
+++ b/background.ts
@ -1,3 +1,33 @@
 import { init } from "./memory";

+// Use global browser object directly (available in extension context)
+declare const browser: any;
+declare const ENABLE_TESTS: boolean;
+
 init();
+
+// Test verification handler for Marionette tests
+// This proves the background script is executing and can communicate with content scripts
+if (ENABLE_TESTS) {
+    browser.runtime.onMessage.addListener((message: any, sender: any, sendResponse: any) => {
+        if (message.type === 'RENTGEN_TEST_VERIFICATION') {
+            // Perform a computation to prove the background script is running
+            // This is not just an echo - we're doing actual processing
+            const inputValue = message.inputValue || 0;
+            const computed = (inputValue * 2) + 3;
+
+            // Send back a response with computed value and metadata
+            const response = {
+                success: true,
+                computed: computed,
+                formula: `(${inputValue} * 2) + 3 = ${computed}`,
+                backgroundTimestamp: Date.now(),
+                receivedFrom: message.url || 'unknown',
+                originalInput: inputValue
+            };
+
+            sendResponse(response);
+            return true;  // Keep channel open for async response
+        }
+    });
+}
--- a/components/report-window/use-survey.ts
+++ b/components/report-window/use-survey.ts
@ -8,7 +8,7 @@ import verbs, { v } from './verbs';
 export default function useSurvey(
    clusters: RequestCluster[],
    { onComplete }: { onComplete: (sender: { data: RawAnswers }) => void }
-): Survey.ReactSurveyModel | null {
+): Survey.Model | null {
    const [survey, setSurvey] = React.useState<Survey.Model | null>(null);
    React.useEffect(() => {
        const model = generateSurveyQuestions(clusters);
--- a/components/sidebar/stolen-data.tsx
+++ b/components/sidebar/stolen-data.tsx
@ -43,7 +43,6 @@ export function StolenData({
                        origin={origin}
                        shorthost={cluster.id}
                        key={cluster.id + origin}
-                        refreshToken={eventCounts[cluster.id] || 0}
                        minValueLength={minValueLength}
                        cookiesOnly={cookiesOnly}
                        cookiesOrOriginOnly={cookiesOrOriginOnly}
--- a/compose.yml
+++ b/compose.yml
@ -0,0 +1,21 @@
+services:
+    rentgen_build:
+        build: .
+
+    rentgen_check:
+        build:
+            context: .
+            target: code_quality
+
+    rentgen_run:
+        build:
+            context: .
+            target: runtime
+        stdin_open: true
+        tty: true
+
+    rentgen_verify:
+        build:
+            context: .
+            target: integration_test
+        restart: "no"
--- a/esbuild.config.js
+++ b/esbuild.config.js
@ -8,6 +8,8 @@ const watch = process.argv.includes('--watch') && {
    },
 };

+const ENABLE_TESTS = process.env.ENABLE_TESTS === 'true';
+
 // see https://github.com/evanw/esbuild/issues/806#issuecomment-779138268
 let skipReactImports = {
    name: 'skipReactImports',
@ -41,17 +43,23 @@ let skipReactImports = {
    },
 };

+const entryPoints = [
+    'components/toolbar/toolbar.tsx',
+    'components/sidebar/sidebar.tsx',
+    'components/report-window/report-window.tsx',
+    'background.ts',
+    'diag.tsx',
+    'styles/global.scss',
+    'styles/fonts.scss',
+];
+
+if (ENABLE_TESTS) {
+    entryPoints.push('tests/test-content-script.js');
+}
+
 esbuild
    .build({
-        entryPoints: [
-            'components/toolbar/toolbar.tsx',
-            'components/sidebar/sidebar.tsx',
-            'components/report-window/report-window.tsx',
-            'background.ts',
-            'diag.tsx',
-            'styles/global.scss',
-            'styles/fonts.scss',
-        ],
+        entryPoints,
        bundle: true,
        // minify: true,
        outdir: './lib',
@ -60,6 +68,7 @@ esbuild
        define: {
            PLUGIN_NAME: '"Rentgen"',
            PLUGIN_URL: '"https://addons.mozilla.org/pl/firefox/addon/rentgen/"',
+            ENABLE_TESTS: String(ENABLE_TESTS),
        },
        external: ['react', 'react-dom', 'survey-react'],
        watch,
--- a/manifest.json
+++ b/manifest.json
@ -3,8 +3,8 @@
    "manifest_version": 2,
    "name": "Rentgen",
    "short_name": "Rentgen",
-    "version": "0.1.10",
-    "author": "Kuba Orlik, Arkadiusz Wieczorek (Internet. Czas działać!)",
+    "version": "0.2.1",
+    "author": "Kuba Orlik, Arkadiusz Wieczorek (Internet. Time to act! Foundation)",
    "homepage_url": "https://git.internet-czas-dzialac.pl/icd/rentgen",
    "background": {
        "scripts": ["lib/background.js"]
--- a/memory.ts
+++ b/memory.ts
@ -13,6 +13,7 @@ function setDomainsCount(counter: number, tabId: number) {

 export default class Memory extends SaferEmitter {
    origin_to_history = {} as Record<string, Record<string, RequestCluster>>;
+
    async register(request: ExtendedRequest) {
        await request.init();
        if (!request.isThirdParty()) {
@ -45,7 +46,6 @@ export default class Memory extends SaferEmitter {

    constructor() {
        super();
-
        browser.webRequest.onBeforeRequest.addListener(
            async (request) => {
                new ExtendedRequest(request);
--- a/package-lock.json
+++ b/package-lock.json
@ -1,12 +1,12 @@
 {
    "name": "rentgen",
-    "version": "0.1.10",
+    "version": "0.2.1",
    "lockfileVersion": 2,
    "requires": true,
    "packages": {
        "": {
            "name": "rentgen",
-            "version": "0.1.10",
+            "version": "0.2.1",
            "license": "GPL-3.0-or-later",
            "dependencies": {
                "@iabtcf/core": "^1.3.1",
@ -2099,6 +2099,125 @@
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            }
        },
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+            "resolved": "https://registry.npmjs.org/esbuild-android-64/-/esbuild-android-64-0.14.49.tgz",
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+            "cpu": [
+                "x64"
+            ],
+            "dev": true,
+            "license": "MIT",
+            "optional": true,
+            "os": [
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+            ],
+            "engines": {
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+            }
+        },
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+            "cpu": [
+                "arm64"
+            ],
+            "dev": true,
+            "license": "MIT",
+            "optional": true,
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+                "android"
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+            "optional": true,
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+            }
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+            "cpu": [
+                "ia32"
+            ],
+            "dev": true,
+            "license": "MIT",
+            "optional": true,
+            "os": [
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+            "engines": {
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@ -2115,6 +2234,142 @@
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+                "arm"
+            ],
+            "dev": true,
+            "license": "MIT",
+            "optional": true,
+            "os": [
+                "linux"
+            ],
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+            }
+        },
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+            "optional": true,
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+            ],
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+            "cpu": [
+                "x64"
+            ],
+            "dev": true,
+            "license": "MIT",
+            "optional": true,
+            "os": [
+                "openbsd"
+            ],
+            "engines": {
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+            }
+        },
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@ -2130,6 +2385,74 @@
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+            ],
+            "dev": true,
+            "license": "MIT",
+            "optional": true,
+            "os": [
+                "sunos"
+            ],
+            "engines": {
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+            }
+        },
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+            "cpu": [
+                "ia32"
+            ],
+            "dev": true,
+            "license": "MIT",
+            "optional": true,
+            "os": [
+                "win32"
+            ],
+            "engines": {
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+            }
+        },
+        "node_modules/esbuild-windows-64": {
+            "version": "0.14.49",
+            "resolved": "https://registry.npmjs.org/esbuild-windows-64/-/esbuild-windows-64-0.14.49.tgz",
+            "integrity": "sha512-+Cme7Ongv0UIUTniPqfTX6mJ8Deo7VXw9xN0yJEN1lQMHDppTNmKwAM3oGbD/Vqff+07K2gN0WfNkMohmG+dVw==",
+            "cpu": [
+                "x64"
+            ],
+            "dev": true,
+            "license": "MIT",
+            "optional": true,
+            "os": [
+                "win32"
+            ],
+            "engines": {
+                "node": ">=12"
+            }
+        },
+        "node_modules/esbuild-windows-arm64": {
+            "version": "0.14.49",
+            "resolved": "https://registry.npmjs.org/esbuild-windows-arm64/-/esbuild-windows-arm64-0.14.49.tgz",
+            "integrity": "sha512-v+HYNAXzuANrCbbLFJ5nmO3m5y2PGZWLe3uloAkLt87aXiO2mZr3BTmacZdjwNkNEHuH3bNtN8cak+mzVjVPfA==",
+            "cpu": [
+                "arm64"
+            ],
+            "dev": true,
+            "license": "MIT",
+            "optional": true,
+            "os": [
+                "win32"
+            ],
+            "engines": {
+                "node": ">=12"
+            }
+        },
        "node_modules/escalade": {
            "version": "3.1.1",
            "resolved": "https://registry.npmjs.org/escalade/-/escalade-3.1.1.tgz",
@ -2811,6 +3134,21 @@
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            "dev": true
        },
+        "node_modules/fsevents": {
+            "version": "2.3.3",
+            "resolved": "https://registry.npmjs.org/fsevents/-/fsevents-2.3.3.tgz",
+            "integrity": "sha512-5xoDfX+fL7faATnagmWPpbFtwh/R77WmMMqqHGS65C3vvB0YHrgF+B1YmZ3441tMj5n63k0212XNoJwzlhffQw==",
+            "dev": true,
+            "hasInstallScript": true,
+            "license": "MIT",
+            "optional": true,
+            "os": [
+                "darwin"
+            ],
+            "engines": {
+                "node": "^8.16.0 || ^10.6.0 || >=11.0.0"
+            }
+        },
        "node_modules/function-bind": {
            "version": "1.1.1",
            "resolved": "https://registry.npmjs.org/function-bind/-/function-bind-1.1.1.tgz",
@ -8845,6 +9183,55 @@
                "esbuild-windows-arm64": "0.14.49"
            }
        },
+        "esbuild-android-64": {
+            "version": "0.14.49",
+            "resolved": "https://registry.npmjs.org/esbuild-android-64/-/esbuild-android-64-0.14.49.tgz",
+            "integrity": "sha512-vYsdOTD+yi+kquhBiFWl3tyxnj2qZJsl4tAqwhT90ktUdnyTizgle7TjNx6Ar1bN7wcwWqZ9QInfdk2WVagSww==",
+            "dev": true,
+            "optional": true
+        },
+        "esbuild-android-arm64": {
+            "version": "0.14.49",
+            "resolved": "https://registry.npmjs.org/esbuild-android-arm64/-/esbuild-android-arm64-0.14.49.tgz",
+            "integrity": "sha512-g2HGr/hjOXCgSsvQZ1nK4nW/ei8JUx04Li74qub9qWrStlysaVmadRyTVuW32FGIpLQyc5sUjjZopj49eGGM2g==",
+            "dev": true,
+            "optional": true
+        },
+        "esbuild-darwin-64": {
+            "version": "0.14.49",
+            "resolved": "https://registry.npmjs.org/esbuild-darwin-64/-/esbuild-darwin-64-0.14.49.tgz",
+            "integrity": "sha512-3rvqnBCtX9ywso5fCHixt2GBCUsogNp9DjGmvbBohh31Ces34BVzFltMSxJpacNki96+WIcX5s/vum+ckXiLYg==",
+            "dev": true,
+            "optional": true
+        },
+        "esbuild-darwin-arm64": {
+            "version": "0.14.49",
+            "resolved": "https://registry.npmjs.org/esbuild-darwin-arm64/-/esbuild-darwin-arm64-0.14.49.tgz",
+            "integrity": "sha512-XMaqDxO846srnGlUSJnwbijV29MTKUATmOLyQSfswbK/2X5Uv28M9tTLUJcKKxzoo9lnkYPsx2o8EJcTYwCs/A==",
+            "dev": true,
+            "optional": true
+        },
+        "esbuild-freebsd-64": {
+            "version": "0.14.49",
+            "resolved": "https://registry.npmjs.org/esbuild-freebsd-64/-/esbuild-freebsd-64-0.14.49.tgz",
+            "integrity": "sha512-NJ5Q6AjV879mOHFri+5lZLTp5XsO2hQ+KSJYLbfY9DgCu8s6/Zl2prWXVANYTeCDLlrIlNNYw8y34xqyLDKOmQ==",
+            "dev": true,
+            "optional": true
+        },
+        "esbuild-freebsd-arm64": {
+            "version": "0.14.49",
+            "resolved": "https://registry.npmjs.org/esbuild-freebsd-arm64/-/esbuild-freebsd-arm64-0.14.49.tgz",
+            "integrity": "sha512-lFLtgXnAc3eXYqj5koPlBZvEbBSOSUbWO3gyY/0+4lBdRqELyz4bAuamHvmvHW5swJYL7kngzIZw6kdu25KGOA==",
+            "dev": true,
+            "optional": true
+        },
+        "esbuild-linux-32": {
+            "version": "0.14.49",
+            "resolved": "https://registry.npmjs.org/esbuild-linux-32/-/esbuild-linux-32-0.14.49.tgz",
+            "integrity": "sha512-zTTH4gr2Kb8u4QcOpTDVn7Z8q7QEIvFl/+vHrI3cF6XOJS7iEI1FWslTo3uofB2+mn6sIJEQD9PrNZKoAAMDiA==",
+            "dev": true,
+            "optional": true
+        },
        "esbuild-linux-64": {
            "version": "0.14.49",
            "resolved": "https://registry.npmjs.org/esbuild-linux-64/-/esbuild-linux-64-0.14.49.tgz",
@ -8852,6 +9239,62 @@
            "dev": true,
            "optional": true
        },
+        "esbuild-linux-arm": {
+            "version": "0.14.49",
+            "resolved": "https://registry.npmjs.org/esbuild-linux-arm/-/esbuild-linux-arm-0.14.49.tgz",
+            "integrity": "sha512-iE3e+ZVv1Qz1Sy0gifIsarJMQ89Rpm9mtLSRtG3AH0FPgAzQ5Z5oU6vYzhc/3gSPi2UxdCOfRhw2onXuFw/0lg==",
+            "dev": true,
+            "optional": true
+        },
+        "esbuild-linux-arm64": {
+            "version": "0.14.49",
+            "resolved": "https://registry.npmjs.org/esbuild-linux-arm64/-/esbuild-linux-arm64-0.14.49.tgz",
+            "integrity": "sha512-KLQ+WpeuY+7bxukxLz5VgkAAVQxUv67Ft4DmHIPIW+2w3ObBPQhqNoeQUHxopoW/aiOn3m99NSmSV+bs4BSsdA==",
+            "dev": true,
+            "optional": true
+        },
+        "esbuild-linux-mips64le": {
+            "version": "0.14.49",
+            "resolved": "https://registry.npmjs.org/esbuild-linux-mips64le/-/esbuild-linux-mips64le-0.14.49.tgz",
+            "integrity": "sha512-n+rGODfm8RSum5pFIqFQVQpYBw+AztL8s6o9kfx7tjfK0yIGF6tm5HlG6aRjodiiKkH2xAiIM+U4xtQVZYU4rA==",
+            "dev": true,
+            "optional": true
+        },
+        "esbuild-linux-ppc64le": {
+            "version": "0.14.49",
+            "resolved": "https://registry.npmjs.org/esbuild-linux-ppc64le/-/esbuild-linux-ppc64le-0.14.49.tgz",
+            "integrity": "sha512-WP9zR4HX6iCBmMFH+XHHng2LmdoIeUmBpL4aL2TR8ruzXyT4dWrJ5BSbT8iNo6THN8lod6GOmYDLq/dgZLalGw==",
+            "dev": true,
+            "optional": true
+        },
+        "esbuild-linux-riscv64": {
+            "version": "0.14.49",
+            "resolved": "https://registry.npmjs.org/esbuild-linux-riscv64/-/esbuild-linux-riscv64-0.14.49.tgz",
+            "integrity": "sha512-h66ORBz+Dg+1KgLvzTVQEA1LX4XBd1SK0Fgbhhw4akpG/YkN8pS6OzYI/7SGENiN6ao5hETRDSkVcvU9NRtkMQ==",
+            "dev": true,
+            "optional": true
+        },
+        "esbuild-linux-s390x": {
+            "version": "0.14.49",
+            "resolved": "https://registry.npmjs.org/esbuild-linux-s390x/-/esbuild-linux-s390x-0.14.49.tgz",
+            "integrity": "sha512-DhrUoFVWD+XmKO1y7e4kNCqQHPs6twz6VV6Uezl/XHYGzM60rBewBF5jlZjG0nCk5W/Xy6y1xWeopkrhFFM0sQ==",
+            "dev": true,
+            "optional": true
+        },
+        "esbuild-netbsd-64": {
+            "version": "0.14.49",
+            "resolved": "https://registry.npmjs.org/esbuild-netbsd-64/-/esbuild-netbsd-64-0.14.49.tgz",
+            "integrity": "sha512-BXaUwFOfCy2T+hABtiPUIpWjAeWK9P8O41gR4Pg73hpzoygVGnj0nI3YK4SJhe52ELgtdgWP/ckIkbn2XaTxjQ==",
+            "dev": true,
+            "optional": true
+        },
+        "esbuild-openbsd-64": {
+            "version": "0.14.49",
+            "resolved": "https://registry.npmjs.org/esbuild-openbsd-64/-/esbuild-openbsd-64-0.14.49.tgz",
+            "integrity": "sha512-lP06UQeLDGmVPw9Rg437Btu6J9/BmyhdoefnQ4gDEJTtJvKtQaUcOQrhjTq455ouZN4EHFH1h28WOJVANK41kA==",
+            "dev": true,
+            "optional": true
+        },
        "esbuild-plugin-sass": {
            "version": "1.0.1",
            "resolved": "https://registry.npmjs.org/esbuild-plugin-sass/-/esbuild-plugin-sass-1.0.1.tgz",
@ -8864,6 +9307,34 @@
                "tmp": "0.2.1"
            }
        },
+        "esbuild-sunos-64": {
+            "version": "0.14.49",
+            "resolved": "https://registry.npmjs.org/esbuild-sunos-64/-/esbuild-sunos-64-0.14.49.tgz",
+            "integrity": "sha512-4c8Zowp+V3zIWje329BeLbGh6XI9c/rqARNaj5yPHdC61pHI9UNdDxT3rePPJeWcEZVKjkiAS6AP6kiITp7FSw==",
+            "dev": true,
+            "optional": true
+        },
+        "esbuild-windows-32": {
+            "version": "0.14.49",
+            "resolved": "https://registry.npmjs.org/esbuild-windows-32/-/esbuild-windows-32-0.14.49.tgz",
+            "integrity": "sha512-q7Rb+J9yHTeKr9QTPDYkqfkEj8/kcKz9lOabDuvEXpXuIcosWCJgo5Z7h/L4r7rbtTH4a8U2FGKb6s1eeOHmJA==",
+            "dev": true,
+            "optional": true
+        },
+        "esbuild-windows-64": {
+            "version": "0.14.49",
+            "resolved": "https://registry.npmjs.org/esbuild-windows-64/-/esbuild-windows-64-0.14.49.tgz",
+            "integrity": "sha512-+Cme7Ongv0UIUTniPqfTX6mJ8Deo7VXw9xN0yJEN1lQMHDppTNmKwAM3oGbD/Vqff+07K2gN0WfNkMohmG+dVw==",
+            "dev": true,
+            "optional": true
+        },
+        "esbuild-windows-arm64": {
+            "version": "0.14.49",
+            "resolved": "https://registry.npmjs.org/esbuild-windows-arm64/-/esbuild-windows-arm64-0.14.49.tgz",
+            "integrity": "sha512-v+HYNAXzuANrCbbLFJ5nmO3m5y2PGZWLe3uloAkLt87aXiO2mZr3BTmacZdjwNkNEHuH3bNtN8cak+mzVjVPfA==",
+            "dev": true,
+            "optional": true
+        },
        "escalade": {
            "version": "3.1.1",
            "resolved": "https://registry.npmjs.org/escalade/-/escalade-3.1.1.tgz",
@ -9391,6 +9862,13 @@
            "integrity": "sha512-OO0pH2lK6a0hZnAdau5ItzHPI6pUlvI7jMVnxUQRtw4owF2wk8lOSabtGDCTP4Ggrg2MbGnWO9X8K1t4+fGMDw==",
            "dev": true
        },
+        "fsevents": {
+            "version": "2.3.3",
+            "resolved": "https://registry.npmjs.org/fsevents/-/fsevents-2.3.3.tgz",
+            "integrity": "sha512-5xoDfX+fL7faATnagmWPpbFtwh/R77WmMMqqHGS65C3vvB0YHrgF+B1YmZ3441tMj5n63k0212XNoJwzlhffQw==",
+            "dev": true,
+            "optional": true
+        },
        "function-bind": {
            "version": "1.1.1",
            "resolved": "https://registry.npmjs.org/function-bind/-/function-bind-1.1.1.tgz",
--- a/package.json
+++ b/package.json
@ -1,6 +1,6 @@
 {
    "name": "rentgen",
-    "version": "0.1.10",
+    "version": "0.2.1",
    "description": "Rentgen is an add-on prepared for both Firefox-based and Chromium-based browsers. This extension will automatically visualize all the data that a given website sends to third parties.",
    "main": "esbuild.config.js",
    "type": "module",
@ -16,10 +16,12 @@
        "build-addon:firefox": "npm i && npm run build:firefox && npm run create-package:firefox",
        "build-addon:chrome": "npm i && npm run build:chrome && npm run create-package:chrome",
        "create-package": "web-ext build --ignore-files '!**/node_modules' '!**/node_modules/**/react-dom' '!**/node_modules/**/react-dom/umd' '!**/node_modules/**/*/react-dom.production.min.js' '!**/node_modules/**/react' '!**/node_modules/**/react/umd' '!**/node_modules/**/*/react.production.min.js' '!**/node_modules/**/survey-react'  '!**/node_modules/**/survey-react/*.min.js' '!**/node_modules/**/survey-react/*.min.css' --overwrite-dest",
-        "create-package:firefox": "cd dist-firefox && web-ext build --overwrite-dest --artifacts-dir ../web-ext-artifacts",
+        "create-package:firefox": "web-ext build --overwrite-dest --artifacts-dir ../web-ext-artifacts",
        "create-package:chrome": "cd dist-chrome && 7z a -tzip ../web-ext-artifacts/rentgen-chrome-0.1.10.zip * && cd ..",
        "typecheck": "tsc --noEmit",
-        "lint": "web-ext lint"
+        "lint": "web-ext lint",
+        "docker:verify": "docker compose up --force-recreate --build --abort-on-container-exit --exit-code-from rentgen_verify",
+        "docker:clean": "docker compose down --rmi local --volumes --remove-orphans"
    },
    "repository": {
        "type": "git",
--- a/tests/pre-commit
+++ b/tests/pre-commit
@ -0,0 +1,21 @@
+#!/bin/bash
+# Pre-commit hook for Rentgen extension
+# Builds and runs verification tests before allowing commit
+
+set -e
+
+echo "Running pre-commit checks..."
+
+# Build all stages
+echo "Building Docker images..."
+docker compose build
+
+# Run code quality checks (typecheck + lint)
+echo "Running code quality checks..."
+docker compose up --abort-on-container-exit --exit-code-from rentgen_check rentgen_check
+
+# Run integration tests
+echo "Running integration tests..."
+docker compose up --abort-on-container-exit --exit-code-from rentgen_verify rentgen_verify
+
+echo "✓ All pre-commit checks passed!"
--- a/tests/test-content-script.js
+++ b/tests/test-content-script.js
@ -0,0 +1,69 @@
+// Test content script - only for automated testing
+// This script proves bidirectional communication between content script and background
+
+// Set initial DOM marker to prove content script is injected
+
+(function() {
+    function setMarker() {
+        if (document.body) {
+            document.body.setAttribute('data-rentgen-injected', 'true');
+        } else {
+            // Wait for DOM ready
+            if (document.readyState === 'loading') {
+                document.addEventListener('DOMContentLoaded', () => {
+                    document.body.setAttribute('data-rentgen-injected', 'true');
+                });
+            }
+        }
+    }
+    setMarker();
+})();
+
+// Listen for test request from Marionette test script
+document.addEventListener('rentgen_test_request', async (event) => {
+    try {
+        // Mark that we received the event
+        document.body.setAttribute('data-rentgen-event-received', 'true');
+
+        // Extract test data from event
+        const testData = event.detail || {};
+        const inputValue = testData.value || 42;
+        const timestamp = testData.timestamp || Date.now();
+
+        // Send message to background script and wait for response
+        // This proves background script is running and responsive
+        const response = await browser.runtime.sendMessage({
+            type: 'RENTGEN_TEST_VERIFICATION',
+            inputValue: inputValue,
+            timestamp: timestamp,
+            url: window.location.href,
+            title: document.title
+        });
+
+        // Store the response from background in DOM
+        // This provides undeniable proof of bidirectional communication
+        if (response && response.success) {
+            document.body.setAttribute('data-rentgen-verified', 'true');
+            document.body.setAttribute('data-rentgen-computed', String(response.computed));
+            document.body.setAttribute('data-rentgen-formula', response.formula);
+            document.body.setAttribute('data-rentgen-background-timestamp', String(response.backgroundTimestamp));
+
+            // Also dispatch a custom event with the results
+            document.dispatchEvent(new CustomEvent('rentgen_test_complete', {
+                detail: {
+                    success: true,
+                    computed: response.computed,
+                    formula: response.formula,
+                    backgroundTimestamp: response.backgroundTimestamp
+                }
+            }));
+        } else {
+            document.body.setAttribute('data-rentgen-verified', 'false');
+            document.body.setAttribute('data-rentgen-error', 'No response from background');
+        }
+    } catch (error) {
+        // Store error in DOM for debugging
+        document.body.setAttribute('data-rentgen-verified', 'false');
+        document.body.setAttribute('data-rentgen-error', String(error));
+    }
+});
--- a/tests/test-lib.js
+++ b/tests/test-lib.js
@ -0,0 +1,58 @@
+// Test library for Marionette-based extension verification
+// This JavaScript code runs in the browser context via Marionette
+
+/**
+ * Inject test content script into the page
+ * @returns {Promise<boolean>} - True if injection successful
+ */
+async function injectTestContentScript() {
+    // Read the content script file
+    const response = await fetch(browser.runtime.getURL('lib/tests/test-content-script.js'));
+    const scriptCode = await response.text();
+
+    // Inject it into the page
+    const script = document.createElement('script');
+    script.textContent = scriptCode;
+    document.documentElement.appendChild(script);
+    script.remove();
+
+    // Wait a bit for script to initialize
+    await new Promise(resolve => setTimeout(resolve, 100));
+
+    return document.body.getAttribute('data-rentgen-injected') === 'true';
+}
+
+/**
+ * Test that background script performs computation correctly
+ * @param {number} testValue - Input value for computation
+ * @returns {Promise<number|null>} - Computed result or null on failure
+ */
+async function testBackgroundComputation(testValue) {
+    // Inject content script first
+    const injected = await injectTestContentScript();
+    if (!injected) {
+        return -1;  // Content script not loaded
+    }
+
+    // Dispatch test request to content script
+    document.dispatchEvent(new CustomEvent('rentgen_test_request', {
+        detail: { value: testValue, timestamp: Date.now() }
+    }));
+
+    // Wait for background response
+    return new Promise((resolve) => {
+        let attempts = 0;
+        const checkInterval = setInterval(() => {
+            attempts++;
+            const computed = document.body.getAttribute('data-rentgen-computed');
+
+            if (computed) {
+                clearInterval(checkInterval);
+                resolve(parseInt(computed));
+            } else if (attempts > 50) {
+                clearInterval(checkInterval);
+                resolve(null);
+            }
+        }, 100);
+    });
+}
--- a/tests/test_verify.py
+++ b/tests/test_verify.py
@ -0,0 +1,131 @@
+#!/usr/bin/env python3
+"""
+test_verify.py - Minimal extension verification test
+
+Verifies the extension background script is executing by testing
+bidirectional communication with a simple addition operation.
+"""
+
+import sys
+import time
+import subprocess
+import os
+import signal
+
+
+def is_tty():
+    """Check if stdout is a TTY."""
+    return sys.stdout.isatty()
+
+
+def red(text):
+    """Return red text if TTY, otherwise plain text."""
+    if is_tty():
+        return f"\033[91m{text}\033[0m"
+    return text
+
+
+def start_xvfb():
+    """Start Xvfb virtual X server. Returns PID."""
+    xvfb = subprocess.Popen(
+        ["Xvfb", ":99", "-screen", "0", "1024x768x24"],
+        stdout=subprocess.DEVNULL,
+        stderr=subprocess.DEVNULL
+    )
+    os.environ["DISPLAY"] = ":99"
+    time.sleep(2)
+    return xvfb.pid
+
+
+def start_webext():
+    """Start web-ext with Marionette enabled. Returns PID."""
+    webext = subprocess.Popen(
+        ["npx", "web-ext", "run",
+         "--arg=-marionette",
+         "--arg=--marionette-port",
+         "--arg=2828"],
+        stdout=subprocess.DEVNULL,
+        stderr=subprocess.DEVNULL
+    )
+    return webext.pid
+
+
+def test_addition():
+    """Test background script via Marionette. Returns (success, result)."""
+    try:
+        from marionette_driver.marionette import Marionette
+
+        # Wait for Firefox to start
+        time.sleep(10)
+
+        # Connect to Marionette
+        client = Marionette(host='localhost', port=2828)
+        client.start_session()
+
+        # Navigate to any page (needed for content script injection)
+        client.navigate("https://example.com")
+        time.sleep(5)
+
+        # Test: background should compute (17 * 2) + 3 = 37
+        test_value = 17
+        expected = 37
+
+        # Load test library
+        test_lib_path = os.path.join(os.path.dirname(__file__), 'test-lib.js')
+        with open(test_lib_path, 'r') as f:
+            test_lib = f.read()
+
+        # Execute test
+        result = client.execute_script(
+            test_lib + "\nreturn testBackgroundComputation(arguments[0]);",
+            script_args=[test_value],
+            script_timeout=10000
+        )
+
+        client.close()
+
+        if result == expected:
+            return True, expected
+        else:
+            return False, result
+
+    except Exception as e:
+        return False, str(e)
+
+
+def cleanup(xvfb_pid, webext_pid):
+    """Kill processes."""
+    try:
+        os.kill(webext_pid, signal.SIGTERM)
+    except:
+        pass
+    try:
+        os.kill(xvfb_pid, signal.SIGTERM)
+    except:
+        pass
+
+
+def main():
+    """Main test."""
+    xvfb_pid = start_xvfb()
+    webext_pid = start_webext()
+
+    success, result = test_addition()
+
+    cleanup(xvfb_pid, webext_pid)
+
+    if not success:
+        print(red(f"FAIL: Expected 37, got {result}"))
+        return 1
+
+    return 0
+
+
+if __name__ == "__main__":
+    try:
+        sys.exit(main())
+    except KeyboardInterrupt:
+        sys.exit(130)
+    except Exception as e:
+        print(red(f"ERROR: {e}"))
+        sys.exit(1)
--- a/tests/verify-enable-tests.sh
+++ b/tests/verify-enable-tests.sh
@ -0,0 +1,124 @@
+#!/bin/bash
+# Verification script for ENABLE_TESTS functionality
+# This script tests that the extension behaves correctly with and without ENABLE_TESTS
+
+set -e
+
+# Colors for output
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[0;33m'
+NC='\033[0m' # No Color
+
+echo "==================================="
+echo "ENABLE_TESTS Verification Script"
+echo "==================================="
+echo ""
+
+# Function to run test and capture result
+run_test() {
+    local test_name="$1"
+    echo "Running: $test_name"
+
+    # Check if test-content-script.js exists in lib/tests/
+    if [ -f "lib/tests/test-content-script.js" ]; then
+        echo "  ✓ test-content-script.js found in lib/tests/"
+    else
+        echo "  ✗ test-content-script.js NOT found in lib/tests/"
+    fi
+
+    # Check if ENABLE_TESTS condition in background.js
+    if grep -q 'if (false)' lib/background.js 2>/dev/null; then
+        echo "  ✓ Test code is disabled (if (false) found)"
+    elif grep -q 'if (true)' lib/background.js 2>/dev/null; then
+        echo "  ✓ Test code is enabled (if (true) found)"
+    else
+        echo "  ? Could not determine test code state"
+    fi
+
+    # If we had Docker working, we would run the actual test here
+    # python3 tests/test_verify.py 2>&1 | tail -5
+    # For now, we just check the build artifacts
+
+    echo ""
+}
+
+# Clean previous builds
+echo "Cleaning previous builds..."
+rm -rf lib/
+echo ""
+
+# Test 1: Production build (without ENABLE_TESTS)
+echo -e "${YELLOW}TEST 1: Production Build (without ENABLE_TESTS)${NC}"
+echo "================================================"
+npm run build > /dev/null 2>&1
+run_test "Production Build"
+
+# Expected:
+# - lib/tests/ should NOT exist
+# - background.js should have 'if (false)'
+if [ ! -d "lib/tests" ] && grep -q 'if (false)' lib/background.js 2>/dev/null; then
+    echo -e "${GREEN}✓ PASS: Production build correctly excludes test code${NC}"
+else
+    echo -e "${RED}✗ FAIL: Production build still contains test code${NC}"
+fi
+echo ""
+
+# Clean for next test
+rm -rf lib/
+
+# Test 2: Test build (with ENABLE_TESTS=true)
+echo -e "${YELLOW}TEST 2: Test Build (with ENABLE_TESTS=true)${NC}"
+echo "============================================="
+ENABLE_TESTS=true npm run build > /dev/null 2>&1
+run_test "Test Build"
+
+# Expected:
+# - lib/tests/test-content-script.js should exist
+# - background.js should have 'if (true)'
+if [ -f "lib/tests/test-content-script.js" ] && grep -q 'if (true)' lib/background.js 2>/dev/null; then
+    echo -e "${GREEN}✓ PASS: Test build correctly includes test code${NC}"
+else
+    echo -e "${RED}✗ FAIL: Test build missing test code${NC}"
+fi
+echo ""
+
+# Summary
+echo "==================================="
+echo "SUMMARY"
+echo "==================================="
+echo ""
+
+# Check both conditions for final verdict
+PROD_OK=false
+TEST_OK=false
+
+# Re-test production build
+rm -rf lib/
+npm run build > /dev/null 2>&1
+if [ ! -d "lib/tests" ] && grep -q 'if (false)' lib/background.js 2>/dev/null; then
+    PROD_OK=true
+fi
+
+# Re-test test build
+rm -rf lib/
+ENABLE_TESTS=true npm run build > /dev/null 2>&1
+if [ -f "lib/tests/test-content-script.js" ] && grep -q 'if (true)' lib/background.js 2>/dev/null; then
+    TEST_OK=true
+fi
+
+if $PROD_OK && $TEST_OK; then
+    echo -e "${GREEN}✓ SUCCESS: ENABLE_TESTS mechanism works correctly!${NC}"
+    echo "  - Production builds exclude test code"
+    echo "  - Test builds include test code"
+    exit 0
+else
+    echo -e "${RED}✗ FAILURE: ENABLE_TESTS mechanism has issues${NC}"
+    if ! $PROD_OK; then
+        echo "  - Production build problem detected"
+    fi
+    if ! $TEST_OK; then
+        echo "  - Test build problem detected"
+    fi
+    exit 1
+fi