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

Firefox crashing after a few seconds upon startup

more options

This is my crash ID: bp-ff99f648-78ab-4cad-b1f5-7aaa70240902 I've already tried troubleshoot mode, same result. I do have a userContent.css file, but deleting it makes no difference, and I can think of no other major change I've made to my installation.

I would prefer not to have to reinstall Firefox.

This is my crash ID: bp-ff99f648-78ab-4cad-b1f5-7aaa70240902 I've already tried troubleshoot mode, same result. I do have a userContent.css file, but deleting it makes no difference, and I can think of no other major change I've made to my installation. I would prefer not to have to reinstall Firefox.

All Replies (7)

more options

One more thing, this started happening after I logged into a Mozilla account for syncing.

Helpful?

more options

Update: After deleting the signedInUser.json file underneath the profile, it the issue seems to have been fixed.

Unfortunately, signing back in again causes the issue again.

Helpful?

more options

Windows home or pro? What security software are you running? What version of Firefox? Also try another version of Firefox. https://www.mozilla.org/en-US/firefox/channel/desktop/Firefox Make sure to install in a different directory from the current install.

jonzn4SUSE modificouno o

Helpful?

more options

I am running Windows Home 10, no security software except for Windows Defender, and Firefox Stable 129.0.2

stag-enterprises modificouno o

Helpful?

more options

Log into another windows account and see if you have the same issue.

Helpful?

more options

I don't have any other accounts.

Helpful?

more options

Create another account.

Add a user account: In the Settings app on your Windows device, select Accounts, Other user or use the following shortcut other Users. Under Add other user , select Add account. Enter the account information for this person to sign in Follow the instructions to finish setting up the account.

https://www.google.com/search?q=Windows+10+user+account&client=firefox-b-1-d&sca_esv=48b4c54c89bd4182&sca_upv=1&ei=_z_WZrPLDvmf5NoP-JDi6QU&ved=0ahUKEwjzxpGQq6WIAxX5D1kFHXiIOF0Q4dUDCBA&oq=Windows+10+user+account&gs_lp=Egxnd3Mtd2l6LXNlcnAiF1dpbmRvd3MgMTAgdXNlciBhY2NvdW50SABQAFgAcAB4AJABAJgBAKABAKoBALgBDMgBAJgCAKACAJgDAJIHAKAHAA&sclient=gws-wiz-serp

jonzn4SUSE modificouno o

Helpful?

Ask a question

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