Mozilla releases Firefox 153 with bug fixes and new iOS AI assistant

Mozilla rolled out Firefox 153.0.1 as its weekly correction update, addressing several stability issues. A crash on Windows start‑up caused by missing internal files was fixed, along with an audio‑mute problem on some streaming sites, flickering when a custom start‑page background is used, and incorrect “New” labeling of previously installed search engines. Developer tools were updated to correctly expand pseudo‑elements, source‑view bugs were resolved, and improvements were made to the Pointer Lock API and user‑agent handling.

The same version was also released for Apple iOS devices (iPhone, iPad, iPod touch) in the App Store. For English‑language users in the United States, Mozilla introduced a voice‑based AI assistant that runs entirely on‑device using Apple’s speech‑recognition technology; no raw audio or browsing data is sent to external servers. Users can invoke the assistant via a home‑screen button, and the feature can be disabled in Firefox’s AI settings. The iOS update also adds a long‑press option to change the app icon and includes the usual performance and stability enhancements.