--- title: Browsers speed up their release cycles, while htmx 4.0... description: Chrome and Firefox both move to two-week release cadences, which is going to mess with anyone's RUM percentiles. Firefox 155 lands Happy Eyeballs v3 and a... canonical: https://daily.dev/posts/browsers-speed-up-their-release-cycles-while-htmx-4-0-ships-to-a-mostly-empty-room-dnn99foyg twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Browsers speed up their release cycles, while htmx 4.0 ships to a mostly empty room | daily.dev og:description: Chrome and Firefox both move to two-week release cadences, which is going to mess with anyone's RUM percentiles. Firefox 155 lands Happy Eyeballs v3 and a... og:url: https://daily.dev/posts/browsers-speed-up-their-release-cycles-while-htmx-4-0-ships-to-a-mostly-empty-room-dnn99foyg og:image: https://api.daily.dev/og/posts/dNN99foYg.png og:image:alt: Browsers speed up their release cycles, while htmx 4.0 ships to a mostly empty room og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Browsers speed up their release cycles, while htmx 4.0 ships to a mostly empty room **[Web Digest](https://daily.dev/sources/webdev_digest)** · 4 min read · 0 upvotes · 0 comments ## Summary Chrome and Firefox both move to two-week release cadences, which is going to mess with anyone's RUM percentiles. Firefox 155 lands Happy Eyeballs v3 and a bunch of new CSS functions. htmx 4.0 shipped stable but npm is keeping 2.x as the default for over a year to avoid breaking CDN users. Remix 3's release candidate and Servo 0.5 both landed with real performance numbers worth a look. ## Content **TLDR:** Chrome and Firefox both move to two-week release cadences, which is going to mess with anyone's RUM percentiles. Firefox 155 lands Happy Eyeballs v3 and a bunch of new CSS functions. htmx 4.0 shipped stable but npm is keeping 2.x as the default for over a year to avoid breaking CDN users. Remix 3's release candidate and Servo 0.5 both landed with real performance numbers worth a look. --- ## Chrome and Firefox both move to two-week release cycles Firefox 155 is the first release under Mozilla's new twice-monthly schedule, and Chrome 153 follows on 8 September. The technical highlight is Happy Eyeballs v3, which races HTTP/2 and HTTP/3 alongside IPv4/IPv6 using HTTPS DNS records to pick the fastest path without waiting on timeouts. For anyone running RUM, faster releases mean browser-version cohorts shrink quicker and a single reporting window can now span two or three major versions, so a percentile shift might just be users upgrading rather than a real regression. One analysis of 7 million+ page loads found a chunk of TTFB time - dubbed Unattributed Navigation Overhead - that doesn't map to any standard phase like DNS or connection time, showing up in over 7 million observations versus just 166 visible redirects. [Read more](https://daily.dev/posts/vbMwzw0q8) ## htmx 4.0 ships stable, but npm won't make it the default until 2027 htmx 4.0 went stable on August 28, but the npm latest tag still points to 2.0.10 to avoid breaking sites that load htmx via unversioned CDN URLs - version 4 stays under the next tag until early 2027. Migration involves real breaking changes: attribute inheritance now needs an :inherited suffix, hx-disable and hx-ignore swap roles, there's a new 60-second default timeout, and hx-ext plus the localStorage history cache are gone. The team is shipping an upgrade-check CLI and an htmx-2-compat extension, and says htmx 2 will be supported indefinitely. [Read more](https://daily.dev/posts/UCiD9Feil) ## Remix 3 release candidate ships with full-stack HMR and database tooling The first RC lands with over 350 commits since beta, adding full-stack hot module replacement and new database tooling. This puts the framework's stable major release within sight. Separately, the Remix home page just got a content and layout overhaul aimed at making it clearer what Remix actually is. [Read more](https://daily.dev/feed-by-ids?id=CbWQG4ThX&id=yKmlGANJA) ## Servo 0.5 lands 488 commits of performance and compatibility fixes Text rendering is up to 10x faster in some cases, and multithreaded 2D canvas rendering improves frame rates by up to 55% while cutting power use by up to 42%. A breaking API change removing webxr_registry() roughly halves servoshell startup time. Real-world fixes include a rendering bug that broke DuckDuckGo's landing page, plus new CSS features like text-decoration-thickness and Linux AArch64 binaries. [Read more](https://daily.dev/posts/Sx6hVv4PJ) --- ## Also notable - **React Testing Library gets 43% faster:** An AI-assisted profiling pass at Sentry's HackWeek found three jsdom fixes - a 91x faster label lookup cache, a matcher fast-path fix, and event-dispatch improvements - that combine to make one test file 43% faster on jsdom 30. [Read more](https://daily.dev/posts/bPDllax5I) - **VS Code 1.135 adds Rubber Duck second-opinion AI review:** The new /rubber-duck command brings in a second AI model to check a Copilot agent's plans and code for missed edge cases, and the release also introduces an Agent Host Protocol that lets agent sessions persist across windows. [Read more](https://daily.dev/posts/rcUNKMDKm) - **Firebase Remote Config moves to usage-based billing:** The new pricing kicks in September 1, 2026, with a free tier covering 100,000 daily fetch requests and a 3-5 month grace period for teams already over that limit. [Read more](https://daily.dev/posts/woDdFD7YM) - **Temporal reaches TC39 Stage 4:** JavaScript's new date/time API is now permanent in the spec and shipped in Chrome since version 144 and Firefox since 139, but Safari only has it in Technology Preview so it's not yet Baseline. [Read more](https://daily.dev/posts/MDmvOkjs8) - **Polaris CDN adopts semantic versioning with a 1.1 release candidate:** Shopify's Polaris Web Components now follow semver where major releases can break things and minors stay compatible, with the 1.1 RC testable now via polaris-1.1-rc.js. [Read more](https://daily.dev/feed-by-ids?id=9AqiKXw3R&id=V3mTPMKKq) --- Tags: [#webdev](https://daily.dev/tags/webdev), [#htmx](https://daily.dev/tags/htmx) [View this post on daily.dev](https://daily.dev/posts/browsers-speed-up-their-release-cycles-while-htmx-4-0-ships-to-a-mostly-empty-room-dnn99foyg) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"DiscussionForumPosting","mainEntityOfPage":"https://daily.dev/posts/browsers-speed-up-their-release-cycles-while-htmx-4-0-ships-to-a-mostly-empty-room-dnn99foyg","headline":"Browsers speed up their release cycles, while htmx 4.0 ships to a mostly empty room","text":"Chrome and Firefox both move to two-week release cadences, which is going to mess with anyone's RUM percentiles. 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