Web Accessibility with Firefox DevTools: Auditing ARIA, Contrast, and Keyboard Navigation
Web accessibility ensures that websites work for all users — including those using screen readers, keyboard-only navigation, or other assistive tech…
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Regex in Firefox: Named Groups, Unicode Support, and DevTools Debugging
Firefox's DevTools include regex testing capabilities, and Firefox's JavaScript engine has some regex-specific features worth knowing for developers…
Testing Security Headers in Firefox: CSP, HSTS, X-Frame-Options, and DevTools Debugging
Security headers are server-side HTTP headers that instruct browsers on security behavior. Firefox implements all the major ones. Here's a practical…
Firefox for Testing and Automation: geckodriver, Playwright, and CI Pipelines
Firefox is an excellent choice for automated testing and web scraping — it has official WebDriver support (geckodriver), a stable API, and unique fe…
Debugging Service Workers in Firefox: DevTools, about:debugging, and Common Issues
Service workers are a critical web platform feature — they enable offline capabilities, push notifications, and background sync. Firefox has full se…
We shipped a proxy extension for Firefox and Edge. Both browsers quietly reuse the old proxy tunnel, and that almost broke it.
We run a pay-as-you-go proxy service. Until this month, using it in a browser meant the manual route: open the proxy settings, type a hostname and p…
Mozilla adopted my Firefox DevTools MCP, but I didn't build it to browse the web
A little while ago I wrote an MCP server that lets an AI agent inspect and control Firefox through the Remote Debugging Protocol. It got adopted int…
Writing unit test for Firefox private browsing window
Our indicator looks like this: an icon + a label. The browser has an indicator for when a user is in private mode. The indicator lives in two places…
I gave your agent access to Firefox - meet Firefox CLI
Firefox CLI is my new project - a CLI interface that lets your agent control your real Firefox session. It's a full equivalent of Agent Browser with…
Security Week 2620: эффект от ИИ для поиска уязвимостей в Firefox
На прошлой неделе разработчики браузера Mozilla Firefox опубликовали детальный отчет об использовании искусственного интеллекта для поиска уязвимост…
Handling Offline Mode in Firefox Browser Extensions
Handling Offline Mode in Firefox Browser Extensions When building extensions that depend on network data — like my Weather & Clock Dashboard — o…
How I Automated Firefox Extension Screenshots for AMO Listings
How I Automated Firefox Extension Screenshots for AMO Listings One of the most tedious parts of publishing to Mozilla's Add-On Observatory (AMO) is…
AMO Review Process: What Happens After You Submit a Firefox Extension
AMO Review Process: What Happens After You Submit a Firefox Extension Submitting a Firefox extension to addons.mozilla.org (AMO) is the end of devel…
Dark Mode in Firefox Extensions: Respecting System Preferences
Dark Mode in Firefox Extensions: Respecting System Preferences Firefox users who prefer dark mode shouldn't have to manually toggle it in every exte…
Responsive Grid Layouts for Browser Extension New Tab Pages
Responsive Grid Layouts for Browser Extension New Tab Pages When building the Weather & Clock Dashboard Firefox extension, one of the tricky cha…
Building Privacy-First Browser Extensions: What I Learned
When I built Weather & Clock Dashboard for Firefox, I made a decision early on: no analytics, no accounts, no external calls except weather data…
5 Firefox New Tab Extensions Compared: Which One Actually Improves Your Workflow?
Your browser opens dozens of times per day. Each time, you see the new tab page for a split second — maybe less. That's hundreds of micro-moments th…