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Mozilla Automation TeamKatherine Patenio13 min readintermediate

Icons! Lots of them! – These Weeks in Firefox: Issue 206

Read on mozilla.org

Summary

Firefox 154 adds a Windows‑only UI to change the default browser icon, exposes a new Picture‑in‑Picture WebAPI, and ships a raft of small but concrete improvements across Add‑ons, DevTools, WebExtensions, WebDriver and the Rust‑based login storage component. Most changes are toggles or bug‑fixes (e.g., CSS handling in the Debugger, startup‑performance regression fix, storage.local auto‑reset, and…

  • New UI in about:settings#appearance lets Windows users pick a custom Firefox icon (non‑Store builds only).
  • Picture‑in‑Picture WebAPI is now shipped (Firefox 153) and sits on top of the existing implementation.
  • Debugger can now optionally handle CSS files via a Settings‑panel checkbox.
  • Project Nova adds theme‑picker UI components to about:addons and updates promo cards.

These updates illustrate Firefox’s incremental but steady focus on developer ergonomics (DevTools UI/keyboard accessibility, debugger enhancements), security and stability (auto‑reset of corrupted storage, removal of legacy telemetry), and cross‑platform consistency (Rust login storage). The Window…

5/10
firefoxrustdevtoolswebdriverwebextensionswindows

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