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

Why won't my add-on settings save?

  • 6 cavab
  • 1 has this problem
  • 1 view
  • Last reply by FredMcD

more options

I am running Firefox Nightly 54.0a1 (2017-01-28) (64-bit) and for some add-ons my settings won't save (for example QuickNote). But if I launch regular Firefox, and change the settings they do save and then work for Firefox Nightly too. I have tried factory resetting and reinstalling, but nothing worked.

I am running Firefox Nightly 54.0a1 (2017-01-28) (64-bit) and for some add-ons my settings won't save (for example QuickNote). But if I launch regular Firefox, and change the settings they do save and then work for Firefox Nightly too. I have tried factory resetting and reinstalling, but nothing worked.

All Replies (6)

more options

Did you do the initial check for issues with prefs?

Did you try a new profile?

Note that you should have a separate profile for each Firefox version and never use a profile with different Firefox version. This is even more important when you use unstable Nightly and Developer Edition builds.

more options

cor-el said

Did you do the initial check for issues with prefs? Did you try a new profile? Note that you should have a separate profile for each Firefox version and never use a profile with different Firefox version. This is even more important when you use unstable Nightly and Developer Edition builds.



I created a separate profile for Nightly, but that didn't help. I checked the prefs.js file and it appears that Nightly cannot modify that file or something. When I change a setting in regular Firefox that thing immediately saves to prefs.js, but that is not the case with Nightly. I ran them both on separate profiles.

more options

https://support.mozilla.org/en-US/kb/how-to-fix-preferences-wont-save

Note: Some software, like Advanced SystemCare with Surfing Protection, can protect files in the Firefox profile folder against changes. If you have such software then check the settings or uninstall this software.

more options

Did you check the permissions for the file?

What happens if you delete the prefs.js file while Firefox is running?

Does a new file get created when you close Firefox?

more options

FredMcD said

https://support.mozilla.org/en-US/kb/how-to-fix-preferences-wont-save Note: Some software, like Advanced SystemCare with Surfing Protection, can protect files in the Firefox profile folder against changes. If you have such software then check the settings or uninstall this software.

I don't have any of that. I even have windows defender disabled. The only thing I use is malware bytes.

cor-el said

Did you check the permissions for the file? What happens if you delete the prefs.js file while Firefox is running? Does a new file get created when you close Firefox?

Everything is allowed for every user. It's not read-only either,

If I delete and exit Firefox, a new prefs.js does get created. It still won't save my setting though.

I wanna mention that this is not the case for all extensions. Only for a few. uBlock origin or uMatrix settings work. The only problem I'm having is some addon name I cannot remember right now and QuickNote.

more options

Snailen said

FredMcD said
https://support.mozilla.org/en-US/kb/how-to-fix-preferences-wont-save

I even have windows defender disabled. The only thing I use is malware bytes.

Did you check the link I posted?