Firefox Nightly Adds Adaptive URL Autofill, Closing Long-Standing Gap With Chrome
Mozilla has added adaptive URL autofill to Firefox Nightly, a feature that learns a user’s browsing habits and completes full page paths in the address bar — functionality Chrome and Edge have offered for years.
The change appears in Nightly build 152 and carries into the current version 153, marking a shift in how Firefox handles address bar predictions.
What Changed
Previously, Firefox autofill only completed root domains. Typing “red” would return reddit.com and stop there.
Under the new behavior, the browser tracks which specific pages a user visits most often and surfaces those instead. A user who frequents a particular subreddit might now see the full path — such as reddit.com/r/firefox — complete automatically after just a few keystrokes.
Mozilla tracked the feature request through Bugzilla issue #2032547, where users had pushed for the change over an extended period.
How Mozilla Built In a Correction Mechanism
The update includes a management tool to handle unwanted suggestions. If the browser autofills a page a user no longer wants surfaced, a new menu option lets them dismiss it directly — effectively training the algorithm to exclude that result going forward.
Still, the system defers to familiar behavior when frequency warrants it. If a user visits a site’s root domain more often than any specific sub-page, the browser defaults to standard domain-level autofill.
Desktop Only for Now
Adaptive autofill is currently limited to the desktop version of Firefox Nightly. Android and iOS users on Nightly builds do not have access to it, and Mozilla has not announced a timeline for mobile availability.
The feature has not reached Firefox’s stable release channel. Its active development in Nightly suggests a broader rollout is likely, though Mozilla has not confirmed a schedule.
A Toggle for Those Who Want Out
For users who prefer the old behavior, Mozilla included an about:config flag — a settings override tool built into Firefox That Lets advanced users modify browser behavior at a granular level — to disable the adaptive system entirely.
Whether that toggle survives into the stable release remains an open question.
The Trade-Off
Adaptive autofill speeds up navigation for users who return to the same pages repeatedly. That said, the behavior introduces a degree of unpredictability: a user who types a search term and presses Enter without registering an autofill suggestion could land on a previously visited page rather than a search results page.
Users who rely on bookmarks for frequent destinations and prefer manual control over address bar completions may find the feature adds friction rather than removing it.
Mozilla’s Firefox holds roughly 2.5% of the global desktop browser market, according to StatCounter data from early 2025, compared to Google Chrome’s share of approximately 65%. The autofill gap has long been a minor but consistent point of comparison between the two browsers.
