Subj : Firefox 155 released
To   : All
From : LWN.net
Date : Wed Sep 02 2026 12:50:00


Version
155 of the Firefox web browser has been released. Notable changes include a
count in the address bar of how many ad trackers Firefox has blocked, container
reordering, and ensuring that mailto: links are only opened by explicit
user actions. There is also a change of the domain used for "captive portals"
(such as the ones used to sign into hotel WiFI): Firefox now uses
"firefox-portal-detection.com" instead of "detectportal.firefox.com", which may
require a change in network allow lists.

The release also includes a number of changes
that may impact web developers, as well as a number of bug fixes and security
fixes.

https://lwn.net/Articles/1091926/
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