If Firefox displays a row that already has a number value, skip to step 5. Normally, Firefox will display a bar with Boolean Number String and a plus button. (B) In the search box in the page, type or paste ui.textScaleFactor and pause while the list is filtered Please keep in mind that changes made through this back door aren't fully supported and aren't guaranteed to continue working in the future. More info on about:config: Configuration Editor for Firefox.

(A) In a new tab, type or paste about:config in the address bar and press Enter/Return. This one seems to be working for many people to revert the change: Otherwise, Firefox 103 has 3 interrelated hidden settings that control the overall zoom level and whether it considers information from the system. BUT if it's not needed for other programs, you can reset that to 100% to resolve the issue: You may like the effect that Windows setting has in other programs, and want to keep it. Hope they fix this soon.Īctually, I don't think anything on the Settings page will help with changes to the overall scale of the browser, but just in case, what adjustments do not get saved?įirefox 103 now applies the Windows 'Make text bigger' setting as a zoom multiplier ( Release Notes). You can make adjustments in the settings but it won't save those either.