This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

XULrunner error

more options

I just started getting this error on 13 August 2024. “XULRunner Error: Platform version ‘129.0.1’ is not compatible [etc.]”. Is there a solution? I can't even get in to see what version of FF I have.

I don't want to lose all my bookmarks if I reinstall Firefox. And I noticed in past similar problems, the prolem may persist with a newly loaded Firefox.

I just started getting this error on 13 August 2024. “XULRunner Error: Platform version ‘129.0.1’ is not compatible [etc.]”. Is there a solution? I can't even get in to see what version of FF I have. I don't want to lose all my bookmarks if I reinstall Firefox. And I noticed in past similar problems, the prolem may persist with a newly loaded Firefox.
Bafoto sur écran jointes

All Replies (1)

more options

You may need to reinstall Firefox. I would download Firefox, install in a different directory Ex. C:\Program Files\New_Mozilla Firefox. Then you should be able to import the data from the old Firefox.

Ezalaki modifié na jonzn4SUSE

Helpful?

Tuna motuna

You must log in to your account to reply to posts. Please start a new question, if you do not have an account yet.