Firefox Release Notes

Reverted the changes recently shipped in Firefox 125 that more proactively blocked downloads from potentially untrustworthy URLs. The changes caused unexpected problems with downloading files in some situations. We plan to fix and re-enable these protections in a future release. (Bug 1892069)

When attempting to launch Firefox while it is already running, an extra blank tab with an address of https://0.0.0.1 may sometimes appear. The cause of this has been identified and will be resolved in the Firefox 125.0.3 release.

Some users have reported seeing long hangs when clicking on the address bar due to the new Clipboard Suggestion feature. Disabling this functionality by unchecking the "Clipboard" box in about:preferences#search should resolve the hangs for impacted users. The underlying performance issue will be addressed in a future Firefox release.