Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

Avatar for Username

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

This thread was archived. Please ask a new question if you need help.

can't open "about:config"

thomasmatthews
thomasmatthews
more options

every time I open FIREFOX there is BOX WHICH SAYS....EMBARASSING....TABS, WINDOWS...CLOSE / Restore and can't get "about:config"....I have Mountain Lion on MacbookPro and Snow Leopard on my iMac...

It is annoying ...started after updating to version 20.0 Tom:-) 16.4.13

every time I open FIREFOX there is BOX WHICH SAYS....EMBARASSING....TABS, WINDOWS...CLOSE / Restore and can't get "about:config"....I have Mountain Lion on MacbookPro and Snow Leopard on my iMac... It is annoying ...started after updating to version 20.0 Tom:-) 16.4.13

All Replies (4)

Dron Rathore
Dron Rathore
more options

Hi Thomas, Try opening Firefox in Safe mode, if it didn't work, open a new tab type in navigation bar about:support. On the page that opens click on Reset Firefox. If that won't fix your problem, there are 2 more alternatives:

  1. Reinstall Firefox
  2. Downgrade to previous version from here

Cheers!

philipp
philipp
  • Moderator
more options

hello, can you specify why you cannot open about:config/what happens if you try?

you should be able to reach it by just entering about:config into the firefox address bar (see screenshot).

Modified by philipp

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

A likely cause is that you are first closing all Firefox windows and then close the Firefox application.

Some have reported that closing Firefox (Firefox > Quit) while the browser window is still open works for them.

  • Bug 845681 - Closing all windows and quitting Firefox afterwards leads to about:sessionrestore to be shown on next startup

(please do not comment in bug reports: https://bugzilla.mozilla.org/page.cgi?id=etiquette.html)

thomasmatthews
thomasmatthews Question owner
more options

Thanks for all the help....problem seems solved.

Tom:-) 18.4.13