Firefox Community Forum

Updated my Win 11 laptop with latest changes and find the fonts on pages and on tabs is all messed up. I've tried Settings to choose larger size, set defaults to Arial and/or Arial Round .... does not help.

How do I either fix this, or undo this update, or is there a fix coming ASAP??

I started up Firefox this morning and received to following message

XULRunner Error: Platform version '127.0.2 is not compatible....

i found this error on the internet, proposed solution, I uninstalled Firefox and found my profiles... NO WHAT DO I DO....?

The Firefox Linux Systems inappropriately stops to play online videos, the social media videos or display pictures. The system is not manageable by administrators at the public library and is only helped sometimes by government officials. Is there anyway the Library system could be helped to play videos.

I have used Firefox as my preferred web browser for years. Following an update a couple of weeks ago, Firefox no longer starts. Instead I get the following error message:

XUL Runner Error: Platform version '127.0.2 is not compatible with minVersion>=127.0.1 maxVersion<=127.0.1

My OS is Windows 10.

I would be most grateful for any advice on how to regain access to Firefox.

Please advise how to disable automatic updates on Firefox running on Linux Kubuntu. Solutions posted on mozilla.org do not work because stated disable options are not available(see screenshot). I have set app.auto.update to false in about:config but this does not disable updates. I have been repeatedly advised not to disable updates so I am aware of the so called risk. I am very tired of every update breaking a reliable browser and having to repair/fix/workaround each and every time. Please provide a viable solution.

Receiving the following error message:

Error: Platform version '129.0' is not compatible with minVersion >= 128.0.3 maxVersion <= 128.0.3

How do I resolve this?

Hi,

I went to my local streaming platform Videoland (It's like netflix, a paid platform to watch series) And it's telling me the video can't play because my browser version is too old and I need to update it.

Of course, I checked and, well... my firefox is up to date. What could be the problem?

Thanks!

We use Firefox Developer Edition in our Enterprise and any auto-update (whether it be the background process or 'check for updates' button) fails to work, due to much of mozilla.org being blocked by our internet security. I want to be able to provide our security team with a definitive URL that the auto-update process uses.

I found mentions of aus5.mozilla.org but in testing this has proved not to be used.

My organization has been using Firefox ESR for many years. I am trying to upgrade from ESR 115.12 to ESR 128.1 The upgrade is hanging at the very end of the install. Procmon shows firefox.exe being launched in the background and hanging. When I manually run firefox.exe, it says "Unable to read configuration file". If I edit "autoconfig.js", and comment out the "general.config.filename", then everything works.

We still use the general.config.filename and have not fully transitioned to the newer policies.json configuration (we have settings in both).

Was a change made in ESR 128 that broke (or stopped supporting) the older format ?

thanks, -stephen