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

I need to roll back the 55.b2 version of the web developer browser to the previous version

  • 6 tontu
  • 12 am na jafe-jafe bii
  • 1 view
  • i mujjee tontu mooy Dwig

more options

Just upgraded to 55.b2 and some critical plugins are failing. They have been flagged as legacy. I need to roll back to the previous version but I am unable to find a website that has older versions. Everything wants to download the most recent version.

I find the website heavy on marketing and light on useful links and information. I am looking for a win-64 version of ff developer

55.a or 54.
Just upgraded to 55.b2 and some critical plugins are failing. They have been flagged as legacy. I need to roll back to the previous version but I am unable to find a website that has older versions. Everything wants to download the most recent version. I find the website heavy on marketing and light on useful links and information. I am looking for a win-64 version of ff developer 55.a or 54.

All Replies (6)

more options

The extensions that are marked as Legacy should still work.

Are there any errors in the Browser Console?

See also this pref:

  • extensions.allow-non-mpc-extensions = true

You can find them here:

more options

Thank you. The issue is I am using 'The Addon Bar (restored' and this extension does not work on the new release. As a result, all of my extensions associated with this bar were not loading.

Thanks for the link to the previous releases.

more options

I believe I read some where that 55 will have magor changes to addons and they will not be working and not be able to install a majority of them as going to a new way of doing things. This was released on the 14th if have not seen it: https://blog.mozilla.org/addons/2017/06/14/webextensions-firefox-55/

more options

Maybe try the Classic Theme Restorer extension.

  • you can check out the settings of the CTR extension via its "Options/Preferences" button on the "Tools -> Add-ons -> Extensions" page.
  • you can find extra toolbar buttons and more toolbar settings in Customize (3-bar Firefox menu button -> Customize)
more options

Not exactly the same problem but 55.0.2 is really lagging with menus and bookmark toolbar folders.

https://support.mozilla.org/en-US/questions/1171768

more options

I found that Session Manager was badly messed up with 55; it consistently added many blank tabs to a session, and when reloading a session, it appended the sessions' tabs rather than replacing the existing tabs.

Also, the status bar was empty, and Customize was unable to add "tools" to it. In addition, I was unable to exit Customize; the Exit button didn't respond to a click (I had moved a couple of my important tools to the address bar). I had to exit FF and restart, and then the tab bar had a few dozen empty tabs.

I've dropped back to 54.0.1 (64 bit), which is working fine.

Question: am I going to be stuck forever with 54, or will Customize and Session Manager be upgraded at some point? Or will I have to abandon FF and go to something like Opera?