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

Èròjà atẹ̀lélànà yii ni a ti fi pamọ́ fọ́jọ́ pípẹ́. Jọ̀wọ́ béèrè ìbéèrè titun bí o bá nílò ìrànwọ́.

Can't instal new version of firefox after stopping refresh

more options

firefox very slow, started refresh, after over an hour, stopped refresh, firefox crashed, won't reload. TRASHED FIREFOX APP, downloaded fresh version, will not instal. "profile and data missing"

Firefox GONE and I WANT it BACK!!! HELP!!!

firefox very slow, started refresh, after over an hour, stopped refresh, firefox crashed, won't reload. TRASHED FIREFOX APP, downloaded fresh version, will not instal. "profile and data missing" Firefox GONE and I WANT it BACK!!! HELP!!!

Ọ̀nà àbáyọ tí a yàn

After you create a new profile, we can help you recover data from the old profile. This article describes the most valuable contents if you want to give it a try first: Recover important data from an old profile.

Your old profile should be in one of the following places:

(1) On your desktop, inside an Old Firefox Data folder (2) In its original location, inside the Firefox Profiles folder

To find #2 if needed, starting from your new profile, either:

  • "3-bar" menu button > "?" button > Troubleshooting Information
  • (menu bar) Help > Troubleshooting Information
  • type or paste about:support in the address bar and press Enter

In the first table on the page, click the "Show in Finder" button. This should launch a new window listing your currently active profile folder contents. Make a note of the profile name, then navigate up one level in Finder to the Profiles folder. Is there another semi-randomly-named profile there? If so, most likely that has your old data.

Sometimes things may get confused when copying between folders so I suggest making a backup before you get started.

Ka ìdáhùn ni ìṣètò kíkà 👍 0

All Replies (2)

more options
more options

Ọ̀nà àbáyọ Tí a Yàn

After you create a new profile, we can help you recover data from the old profile. This article describes the most valuable contents if you want to give it a try first: Recover important data from an old profile.

Your old profile should be in one of the following places:

(1) On your desktop, inside an Old Firefox Data folder (2) In its original location, inside the Firefox Profiles folder

To find #2 if needed, starting from your new profile, either:

  • "3-bar" menu button > "?" button > Troubleshooting Information
  • (menu bar) Help > Troubleshooting Information
  • type or paste about:support in the address bar and press Enter

In the first table on the page, click the "Show in Finder" button. This should launch a new window listing your currently active profile folder contents. Make a note of the profile name, then navigate up one level in Finder to the Profiles folder. Is there another semi-randomly-named profile there? If so, most likely that has your old data.

Sometimes things may get confused when copying between folders so I suggest making a backup before you get started.