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

Installed addon is getting deleted everytime I reopen firefox (I have two different versions of FF in my PC)

more options

I have Installed Firefox 54 and latest Firefox 57 in my PC.

Firefox 57 is installed at C:\Program Files\Mozilla Firefox Firefox 54 is Installed at C:\Program Files\Mozilla Firefox 54

I Installed Selenium IDE addon on Firefox 54 and after my work is done, I worked on Firefox 57. Now If I reopen Firefox 54 then installed addon is gone. I have to reinstall it.

How to resolve this issue?

I have Installed Firefox 54 and latest Firefox 57 in my PC. Firefox 57 is installed at C:\Program Files\Mozilla Firefox Firefox 54 is Installed at C:\Program Files\Mozilla Firefox 54 I Installed Selenium IDE addon on Firefox 54 and after my work is done, I worked on Firefox 57. Now If I reopen Firefox 54 then installed addon is gone. I have to reinstall it. How to resolve this issue?

All Replies (1)

more options

Hopefully, you created completely separate profiles for Firefox 54 and Firefox 57 but if not, you definitely need to do that because of the large number of changes between those versions.

Profile Manager - Create, remove or switch Firefox profiles

If there is a problem keeping each Firefox in its own profile, I have to admit I don't know how to manage Selenium. For manually-initiated Firefox, you can add the profile name (and if you need to run them simultaneously, no-remote) command line switches to your shortcut, for example:

"C:\Program Files\Mozilla Firefox\firefox.exe" -P "Legacy54" -no-remote

Details on those switches: https://developer.mozilla.org/docs/Mozilla/Command_Line_Options