Went into about: config again - browser.display.os-zoom-behavior - changed to zero. Guess I didn't save it first time. The web pages are back to normal, but the headings up top - File, edit, view etc., the tabs and the address field and icons to the right of it (refresh, home and zoom percentage icon) are WAY too tiny. The bookmarks and history listing of web sites are very, very tiny when the window unfolds (before this they were WAY too big).

Tried increasing both the display settings, but neither worked. How do I get the top part of the browser back to what it was?

Before locking in the 0, I had also tried about:config browser.compactmode.show and changed it to true. Neither true or false brings back the top of the browser to the way it was.

Also, the right click window - copy, paste, undo, etc. - is also way too small!

Tried changing 0 to .5. Won't accept it.

Tried about:config browser.display.os-zoom-behavior and changed it from -1.5 to 1.5 and that got the top part of the browser to what it was, but the web pages went to oversized again.

Windows' "Make text bigger" accessibility setting now affects all the UI and content pages, rather than only applying to system font sizes.

To get stuff back to normal, reset Windows' "Make text bigger" setting to 100% or enter about:config in the URL bar and create a new number pref ui.textScaleFactor = 100.

Ty, thanks. I went into ui.textScaleFactor, made it 111 actually.

I was in the Windows Settings - Ease of Access - "Make Text Bigger" sliding ruler setting. No matter what I changed it to, nothing on the FF browser changed (that setting controls the size of the top of all browsers, the size of your desktop icons, right-click windows, etc.) But with this Firefox 103 update, for some reason, it wouldn't let that setting work. Firefox blocked it (only in Firefox).

But this should never have happened. And once it did, they should have came out with a new update immediately.

Maybe also check browser.display.os-zoom-behavior and layout.css.devPixelsPerPx.

• https://searchfox.org/mozilla-release/source/modules/libpref/init/StaticPrefList.yaml#line-1163
• https://searchfox.org/mozilla-release/source/modules/libpref/init/StaticPrefList.yaml#line-7625

WARNING from the moderator team: Changing Firefox pref from the about:config page can sometimes break Firefox or cause strange behavior. You should only do this if you know what you're doing.

Please read Firefox Advanced Customization and Configuration Options to learn more.

I noticed this too, it makes Firefox unusable. I can't believe they passed the update with sure a bad bug! I'm not prepared to mess about with windows settings which affect other things - I had it set just as I need it, as I'm partially sighted. For now, I've been forced to use Windows Restore, to go back to before the update & disable automatic updates. This solved the problem, but now I get nagged to update every time - how do I stop this please? I really hope that Mozilla rectify this awful problem very soon, or I'll be switching to Waterfox, or another browser. Is there a way of checking that it's been fixed, without actually updating?

Go into about:config and then enter ui.textScaleFactor click on number and enter 100, or a number higher or lower.

.... but now I get nagged to update every time - how do I stop this please? ...

To switch off updates permanently you need to modify the registry, the easiest way is copy the following into a text file and save as ffudoff.reg (must be .reg not .txt) and double click it, job done: quote:

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Mozilla\Firefox] "DisableAppUpdate"=dword:00000001

/quote

and to undo, copy following to ffudon.reg quote:

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Mozilla\Firefox] "DisableAppUpdate"=dword:00000000

/quote

Or just run regedit and alter said entry.

When that's done and you go to 'Help-About Firefox' You'll see "Updates disabled by your system administrator".