2025 in Review: What’s New in Web Performance? deb )Dec 5, 2025 174 performance , web-vitals , lighthouse , apis , speculation , chrome , google , browsers , dev-tools , tooling , testing , mcp , ai , retrospectives , outlooks New to the Web Platform in November rac /dev )Nov 26, 2025 173 release-notes , web-platform , browsers , mozilla , safari , apple Firefox Is Adding Support for a Feature That Users Requested Since 2004 Nov 17, 2025 172 mozilla , browsers , keyboard-shortcuts New to the Web Platform in October rac /dev )Oct 30, 2025 171 release-notes , web-platform , browsers , mozilla , chrome , google See What’s New in Firefox [144.0] fir )Oct 14, 2025 170 release-notes , mozilla , browsers Interop Feature Ranking jaf /fir )Oct 9, 2025 169 websites , interoperability , mozilla , browsers New to the Web Platform in September rac /dev )Oct 1, 2025 168 release-notes , web-platform , browsers , safari , apple , mozilla , chrome , google Chrome Mask: Make Firefox Appear as Chrome With a Single Click Sep 8, 2025 167 mozilla , chrome , browsers , browser-extensions Experimental: Firefox Now Supports Progressive Web Apps on Windows Aug 22, 2025 166 mozilla , browsers , progressive-web-apps , web-apps Firefox 142 for Developers mdn )Aug 20, 2025 165 release-notes , mozilla , browsers Mozilla Under Fire for Firefox AI “Bloat” That Blows Up CPU and Drains Battery neo )Aug 9, 2025 164 mozilla , browsers , ai , performance New to the Web Platform in July rac /dev )Jul 31, 2025 163 release-notes , web-platform , browsers , mozilla Shipping WebGPU on Windows in Firefox 141 jbl /moz )Jul 15, 2025 162 webgpu , mozilla , browsers , windows , microsoft New to the Web Platform in June rac /dev )Jun 30, 2025 161 release-notes , web-platform , browsers , chrome , google , mozilla , safari , apple New to the Web Platform in May rac /dev )May 29, 2025 160 release-notes , web-platform , browsers , mozilla , chrome , google , safari , apple Mozilla Say Google Search Deal Vital to Firefox’s Survival d0o /omg )May 5, 2025 159 mozilla , browsers , google New to the Web Platform in April rac /dev )Apr 30, 2025 158 release-notes , web-platform , browsers , chrome , google , mozilla , safari , apple Firefox 137.0.2 Is a Big Bug Fix and Security Update Release Apr 15, 2025 157 mozilla , browsers Firefox Release Notes [Firefox 137.0] moz )Apr 1, 2025 156 release-notes , mozilla , browsers New to the Web Platform in March rac /dev )Mar 31, 2025 155 release-notes , web-platform , browsers , mozilla , safari , apple , chrome , google Firefox 136 Launches With Vertical Tabs, but One Requested Feature Is Still Missing Mar 4, 2025 154 mozilla , browsers Mozilla Updates Firefox Terms Again After Backlash Over Broad Data License Language the )Mar 1, 2025 153 mozilla , browsers , licensing New to the Web Platform in February rac /dev )Feb 28, 2025 152 release-notes , web-platform , browsers , mozilla , chrome , google , safari , apple Firefox: Mozilla Confirms Support for Classic Extensions and Manifest V3 Add-Ons Feb 26, 2025 151 mozilla , browsers , browser-extensions Browsers: A Snapshot bry )Feb 25, 2025 150 browsers , browser-extensions , chromium , edge , microsoft , mozilla , brave , safari , apple Firefox 135 Launches With New Translation Languages, New Tab Layout, Security, and Privacy Improvements Feb 4, 2025 149 mozilla , browsers New to the Web Platform in January rac /dev )Jan 29, 2025 148 release-notes , web-platform , browsers , mozilla , chrome , google , safari , apple Running Inference in Web Extensions tar /moz )Jan 22, 2025 147 mozilla , browsers , ai New to the Web Platform in November rac /dev )Nov 28, 2024 146 release-notes , web-platform , browsers , mozilla , chrome , google 20 Years of Firefox: How a Community Project Changed the Web moz )Nov 18, 2024 145 mozilla , browsers , history , anniversaries New to the Web Platform in October rac /dev )Oct 30, 2024 144 release-notes , web-platform , browsers , mozilla , chrome , google , safari , apple Celebrating 20 Years of Firefox Oct 28, 2024 143 videos , anniversaries , mozilla , browsers New to the Web Platform in September rac /dev )Sep 30, 2024 142 release-notes , web-platform , browsers , chrome , google , mozilla , safari , apple Feature Detecting Scroll-Driven Animations With “@ supports”: You Want to Check for “animation-range” Too bra )Sep 24, 2024 141 css , feature-detection , support , animations , mozilla , browsers Firefox DevTools Newsletter 130 nic /fir )Sep 23, 2024 140 release-notes , mozilla , browsers , dev-tools New to the Web Platform in August rac /dev )Aug 29, 2024 139 release-notes , web-platform , browsers , google , chrome , mozilla The Dying Web mre )Aug 8, 2024 138 browsers , google , chrome , chromium , mozilla , web Announcing Official Puppeteer Support for Firefox moz )Aug 7, 2024 137 browsers , mozilla , puppeteer , support New to the Web Platform in July rac /dev )Jul 30, 2024 136 release-notes , web-platform , browsers , mozilla , apple , safari , google , chrome How to Try Experimental CSS Features hui )Jul 5, 2024 135 how-tos , css , browsers , apple , safari , google , chrome , mozilla New to the Web Platform in June rac /dev )Jun 26, 2024 134 release-notes , web-platform , browsers , mozilla , google , chrome , apple , safari Firefox DevTools Newsletter 127 nic /fir )Jun 18, 2024 133 release-notes , browsers , mozilla , dev-tools See What’s New in Firefox [127.0] moz )Jun 11, 2024 132 release-notes , browsers , mozilla Display the Specificity of a CSS Selector pat /dev )Jun 4, 2024 131 css , selectors , cascade , dev-tools , browsers , google , chrome , microsoft , edge , apple , safari , mozilla New to the Web Platform in May rac /dev )May 29, 2024 130 release-notes , web-platform , browsers , google , chrome , apple , safari , mozilla Here’s What We’re Working on in Firefox moz )May 21, 2024 129 browsers , mozilla New to the Web Platform in April rac /dev )Apr 29, 2024 128 release-notes , web-platform , browsers , mozilla , google , chrome , apple , safari New to the Web Platform in March rac /dev )Mar 28, 2024 127 release-notes , web-platform , browsers , mozilla , apple , safari , google , chrome Bugs I’ve Filed on Browsers nol )Mar 3, 2024 126 browsers , chromium , webkit , quality New to the Web Platform in February rac /dev )Feb 29, 2024 125 release-notes , web-platform , browsers , mozilla , google , chrome , apple , safari Why I Use Firefox sim )Feb 26, 2024 124 browsers , mozilla New to the Web Platform in January rac /dev )Jan 30, 2024 123 release-notes , web-platform , browsers , mozilla , google , chrome , apple , safari Mozilla Says Apple’s New Browser Rules Are “as Painful as Possible” for Firefox ver )Jan 26, 2024 122 browsers , apple , mozilla , mobile Battle of the Browsers zer )Jan 22, 2024 121 browsers , browser-engines , blink , chrome , google , edge , microsoft , brave , gecko , mozilla , webkit , safari , apple , comparisons Chrome Alternative Browsers to Check Out in 2024 Jan 11, 2024 120 browsers , arc , the-browser-company , chromium , mozilla New to the Web Platform in December rac /dev )Dec 19, 2023 119 release-notes , web-platform , browsers , mozilla , google , chrome , apple , safari See What’s New in Firefox [121.0] moz )Dec 19, 2023 118 release-notes , browsers , mozilla How to Enable Experimental CSS and JS Features in Chrome, Firefox, and Safari zor /css )Dec 11, 2023 117 videos , how-tos , experiments , browsers , google , chrome , mozilla , apple , safari Firefox on the Brink? bry )Nov 30, 2023 116 browsers , mozilla New to the Web Platform in November rac /dev )Nov 30, 2023 115 release-notes , web-platform , browsers , google , chrome , mozilla Prodding Firefox to Update “:has()” Selection mey )Oct 19, 2023 114 css , selectors , mozilla , support New to the Web Platform in July rac /dev )Jul 31, 2023 113 release-notes , web-platform , browsers , google , chrome , mozilla , apple , safari See What’s New in Firefox [115.0] moz )Jul 4, 2023 112 release-notes , browsers , mozilla New to the Web Platform in June rac /dev )Jun 30, 2023 111 release-notes , web-platform , browsers , mozilla , google , chrome , apple , safari New to the Web Platform in May rac /dev )May 31, 2023 110 release-notes , web-platform , browsers , google , chrome , mozilla , apple , safari See What’s New in Firefox [113.0] moz )May 9, 2023 109 release-notes , browsers , mozilla New to the Web Platform in April rac /dev )Apr 28, 2023 108 release-notes , web-platform , browsers , google , chrome , mozilla Firefox May Soon Reject Cookie Prompts Automatically Apr 17, 2023 107 cookies , legal , user-experience , mozilla Firefox Rolls Out Total Cookie Protection by Default to More Users Worldwide moz )Apr 11, 2023 106 browsers , mozilla , cookies , privacy New to the Web Platform in March rac /dev )Mar 31, 2023 105 release-notes , web-platform , browsers , google , chrome , mozilla , apple , safari XUL Layout Is Gone Mar 30, 2023 104 history , xul , browsers , mozilla Some Cross-Browser DevTools Features You Might Not Know css )Mar 22, 2023 103 dev-tools , browsers , google , chrome , mozilla , apple , safari New to the Web Platform in January rac /dev )Jan 31, 2023 102 release-notes , web-platform , browsers , google , chrome , mozilla , apple , safari Best Browsers For Developers in 2023 tal )Jan 22, 2023 101 browsers , comparisons , mozilla , polypane , brave , chrome , google Cache the World: Turbo Charging Firefox Accessibility Performance and Maintainability jcs )Dec 22, 2022 100 mozilla , browsers , accessibility , caching Improving Firefox Stability With This One Weird Trick moz )Nov 22, 2022 99 browsers , mozilla Firefox-Only CSS ami )Nov 17, 2022 98 css , browsers , mozilla Significant Improvements for Screen Readers Now in Nightly Firefox moz )Nov 15, 2022 97 browsers , screen-readers , mozilla , accessibility Firefox (and Other Browsers), Forgotten? col )Jul 30, 2022 96 browsers , mozilla , testing Use Firefox for Accessibility Testing col )Jul 17, 2022 95 browsers , mozilla , accessibility , testing Version 100 in Chrome and Firefox moz )Feb 15, 2022 94 browsers , support , google , chrome , mozilla What’s New in DevTools? pat /sma )Jan 26, 2022 93 dev-tools , browsers , google , chrome , microsoft , edge , apple , safari , mozilla How to Customize Firefox UI—Step-by-Step Tutorial Dec 10, 2021 92 how-tos , tutorials , xul , browsers , mozilla , customization Firefox’s “bolder” Default Is a Problem for Variable Fonts sim /css )Sep 7, 2021 91 css , fonts , variable-fonts , browsers , mozilla What’s New With DevTools: Cross-Browser Edition pat /sma )Sep 7, 2021 90 dev-tools , browsers , google , chrome , microsoft , edge , mozilla , apple , safari Looking Fine With Firefox 89 chr /moz )Jun 1, 2021 89 release-notes , mozilla , browsers Warp: Improved JS Performance in Firefox 83 jan /moz )Nov 13, 2020 88 mozilla , browsers , javascript , performance , spidermonkey , javascript-engines A Guide to New and Experimental CSS DevTools in Firefox vx /sma )Oct 10, 2019 87 guides , mozilla , browsers , dev-tools Firefox 69—a Tale of Resize Observer, Microtasks, CSS, and DevTools chr /moz )Sep 3, 2019 86 release-notes , mozilla , browsers How to Enable Experimental Web Platform Features in Chrome and Firefox mic )Jun 21, 2019 85 how-tos , experiments , web-platform , browsers , chrome , google , mozilla Goodbye, EdgeHTML moz )Dec 6, 2018 84 edgehtml , gecko , browser-engines , browsers , mozilla Firefox 63—Tricks and Treats moz )Oct 23, 2018 83 release-notes , mozilla , browsers In Your Face, Passwords: Big Three Browsers All Adopt Authentication API Aug 1, 2018 82 security , authentication , webauthn , apis , edge , microsoft , chrome , google , mozilla , browsers Everything You Need to Know About the Plan to Kill Internet Passwords dav /giz )Jun 7, 2018 81 passwords , authentication , webauthn , chrome , google , mozilla , browsers Firefox 60 Lands: It’s World’s First Browser to Give You Password-Free Logins, Says Mozilla zdn )May 10, 2018 80 mozilla , browsers , webauthn Inspecting Animations in DevTools fon /css )May 4, 2018 79 css , animations , dev-tools , browsers , chrome , google , mozilla Optimizing CSS: Tweaking Animation Performance With DevTools Nov 23, 2017 78 css , animations , performance , optimization , dev-tools , browsers , mozilla Firefox 54: E10S-Multi, WebExtension APIs, CSS “clip-path” moz )Jun 13, 2017 77 release-notes , mozilla , browsers Firefox 53: Quantum Compositor, Compact Themes, CSS Masks, and More moz )Apr 19, 2017 76 release-notes , mozilla , browsers Think You Know the Top Web Browsers? pet )Apr 13, 2017 75 metrics , browsers , chrome , google , mozilla , safari , apple , internet-explorer , microsoft , opera , uc-browser Chrome, Firefox, and Edge Add Support for New WebAssembly Format cam /sof )Mar 15, 2016 74 webassembly , support , browsers , chrome , google , mozilla , edge , microsoft Revisiting Firefox’s DevTools pat /sma )Dec 30, 2015 73 mozilla , browsers , dev-tools Firefox 40: Profiling JavaScript Performance and More eli )Aug 25, 2015 72 mozilla , browsers What’s New in Firefox 39 Jul 14, 2015 71 mozilla , browsers What’s New in Firefox 38 eli )May 18, 2015 70 mozilla , browsers Want Fancy Firefox Features? Secure Your Website sts /cne )Apr 14, 2015 69 mozilla , browsers , http , security What’s New in Firefox 36: Android Debugging, HTTP/2 Support, and More eli )Feb 25, 2015 68 mozilla , browsers What’s New in Firefox 35 cra )Jan 21, 2015 67 mozilla , browsers What’s New in Firefox 34 cra )Dec 4, 2014 66 mozilla , browsers What’s New in Firefox 33 eli )Oct 14, 2014 65 mozilla , browsers Mozilla Relents, Says It Will Implement HTML5 DRM Solution in Firefox fre /tec )May 14, 2014 64 mozilla , browsers , drm , eme Konqueror vs. Firefox May 2, 2014 63 browsers , konqueror , mozilla , comparisons What’s New in Firefox 28 cra )Mar 26, 2014 62 browsers , mozilla What’s New in Firefox 27 cra )Feb 11, 2014 61 browsers , mozilla Despite Automatic Updates, Old Browsers Are Still a Problem edb /zdn )Jan 6, 2014 60 browsers , web-platform , security , chrome , google , mozilla , internet-explorer , microsoft , safari , apple What’s New in Firefox 26 cra )Dec 11, 2013 59 browsers , mozilla What’s New in Firefox 25 cra )Oct 31, 2013 58 browsers , mozilla End of an Era as Firefox Bins “Blink” Tag the )Aug 7, 2013 57 mozilla , browsers , html What’s New in Firefox 23 cra )Aug 7, 2013 56 browsers , mozilla What’s New in Firefox 20 cra )Apr 5, 2013 55 browsers , mozilla Firefox Raises the Online Privacy Bar With New Cookie Policy edb /zdn )Feb 24, 2013 54 mozilla , browsers , cookies , privacy What’s New in Firefox 19 cra )Feb 20, 2013 53 browsers , mozilla Hello Firefox, This Is Chrome Calling sla /dev )Feb 4, 2013 52 chrome , google , mozilla , browsers , webrtc What’s New in Firefox 18 cra )Jan 9, 2013 51 browsers , mozilla Firefox 18 Beta Adds JavaScript Improvements, Retina Display Support tec )Nov 27, 2012 50 mozilla , browsers Happy 10th Birthday Firefox! cra )Sep 26, 2012 49 browsers , mozilla , anniversaries What’s New in Firefox 15 cra )Aug 29, 2012 48 browsers , mozilla Firefox Beta 15 Supports the New Opus Audio Format moz )Jul 19, 2012 47 mozilla , browsers , multimedia What’s New in Firefox 14 cra )Jul 18, 2012 46 browsers , mozilla Turn Off Cache in Firefox When [You’re] Testing Jun 30, 2012 45 caching , browsers , mozilla What’s New in Firefox 12 and Chrome 18 cra )Apr 25, 2012 44 browsers , mozilla , google , chrome Mozilla Delivers Firefox 10 tec )Feb 1, 2012 43 mozilla , browsers What’s New in Firefox 10 cra )Feb 1, 2012 42 browsers , mozilla What’s New in Firefox 9.0 cra )Dec 21, 2011 41 browsers , mozilla What’s New in Firefox 8 cra )Nov 9, 2011 40 browsers , mozilla Mozilla Release Firefox 5 cra )Jun 21, 2011 39 browsers , mozilla HTML5 Forms Validation in Firefox 4 mou )Nov 10, 2010 38 html , forms , validation , mozilla , browsers Opera With Extensions: Now Can It Replace Firefox? smf /bet )Oct 28, 2010 37 opera , mozilla , browsers , browser-extensions HTML5 Accessibility ste )Oct 8, 2010 36 websites , html , accessibility , browsers , support , chrome , google , mozilla , internet-explorer , microsoft , opera , safari , apple Firefox Unveiled: Gecko Basic Data Flow Jun 15, 2010 35 browsers , mozilla , gecko , browser-engines , parsing Firefox 4: CSS3 “calc()” Jun 10, 2010 34 css , functions , mozilla , browsers What’s Coming in Firefox 4.0 cra )May 17, 2010 33 browsers , mozilla Getting Users to Upgrade Their Browsers rey /aja )Apr 9, 2010 32 browsers , chrome , google , internet-explorer , microsoft , mozilla , safari , apple , opera Eight Reasons to Choose Safari or Firefox mac )Dec 29, 2009 31 browsers , safari , apple , mozilla , comparisons Firefox 3.5 Is the World’s Most Popular Browser cra )Dec 22, 2009 30 browsers , mozilla Web Open Font Format for Firefox 3.6 moz )Oct 20, 2009 29 fonts , woff , mozilla , browsers HTML 5 Parser Lands in Gecko dal /aja )Jul 8, 2009 28 html , parsing , gecko , browser-engines , mozilla , browsers Browser CSS Hacks pau )Apr 15, 2009 27 browsers , css , hacks , microsoft , internet-explorer , opera , apple , safari , mozilla Firefox Support for CSS3 Multiple Backgrounds dal /aja )Mar 24, 2009 26 css , backgrounds , support , mozilla , browsers Firefox 3.1 to Support HTML 5 Video and Audio bra /aja )Oct 27, 2008 25 mozilla , browsers , multimedia , html “border-image”: No More Cutting Up Hell dal /aja )Aug 13, 2008 24 css , borders , images , webkit , mozilla , browsers , support What’s the Fastest Way to Code a Loop in JavaScript? Jul 24, 2008 23 javascript , loops , performance , metrics , comparisons , browsers , mozilla , camino , safari , opera , internet-explorer Browser Memory Footprints: Watching With Real Usage dal /aja )Jun 26, 2008 22 browsers , memory , safari , flock , opera , internet-explorer New YSlow With Firefox 3 Support sto )Jun 17, 2008 21 browser-extensions , release-notes , mozilla , browsers , support Firefox 3 CSS and HTML Support Information Available Jun 16, 2008 20 browsers , mozilla , support , html , css Two Hidden Features New in Firefox 3 sen )May 23, 2008 19 browsers , mozilla The Browser Bunch joe /mac )Mar 31, 2008 18 browsers , unix-like , comparisons , safari , apple , flock , camino , mozilla , opera Firefox 3 Offers Numerous Features for Developers Mar 19, 2008 17 mozilla , browsers Color Rendering Difference: Firefox vs. Safari chr /css )Feb 28, 2008 16 colors , rendering , comparisons , mozilla , safari , apple , browsers Firefox 3 Performance Gets a Boost Feb 25, 2008 15 mozilla , browsers , opera , safari , internet-explorer , comparisons , metrics Cursing With JavaScript: Three Random Tips dal /aja )Feb 19, 2008 14 javascript , prototypejs , mozilla , internet-explorer , microsoft , browsers , pop-ups , tips-and-tricks The Great Browser JavaScript Showdown cod )Dec 19, 2007 13 javascript , performance , metrics , opera , safari , apple , internet-explorer , microsoft , mozilla , browsers , comparisons Mozilla Hunting for Memory dal /aja )Nov 13, 2007 12 mozilla , browsers , mobile , memory Font Rendering Differences: Firefox vs. IE vs. Safari chr /css )Aug 29, 2007 11 css , fonts , rendering , mozilla , internet-explorer , microsoft , safari , apple , browsers , comparisons CSS Selectors—Speed Myths Jul 10, 2007 10 css , selectors , performance , metrics , extjs , jquery , dojo , mootools , prototypejs , internet-explorer , safari , opera , browsers , comparisons , myths Firebug Tips and Tricks Apr 18, 2007 9 firebug , tips-and-tricks AJAX/DHTML Library Scorecard: How Cross Platform Are They? Mar 4, 2006 8 ajax , dhtml , libraries , browsers , support , internet-explorer , safari , opera , microsoft “<a ping>” Jan 17, 2006 7 mozilla , browsers , html , privacy Cross Browser Compatibility Jan 17, 2006 6 browsers , interoperability , internet-explorer , microsoft , netscape , mozilla , opera Firebug Jan 12, 2006 5 websites , firebug , mozilla , browsers , dev-tools Firefox Fans Promised Version 1.5 Tonight iai )Nov 29, 2005 4 mozilla , browsers Firefox Takes the Good With the Bad Nov 4, 2005 3 mozilla , browsers Websites Alienate Firefox Users Jun 23, 2005 2 mozilla , browsers Don’t Be Fooled! Keep Internet Explorer at All Cost! plo )Nov 9, 2004 1 internet-explorer , microsoft , mozilla , browsers 