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.

Failed Firefox migration Win 7 to Win 10

  • 1 reply
  • 1 has this problem
  • 1 view
  • Last reply by Scribe

chestersplace
chestersplace
more options

Trying to migrate Firefox profile from Win 7 machine to new Win 10. Downloaded Firefox to new machine, confirmed that it worked, closed it.Using Troubleshooting feature, located active profile in old Win 7 machine, copied to USB stick. Closed Firefox on new machine, navigated to Profiles folder, copied the Win 7 file to it and deleted the existing file. Tried to start Firefox, got 'Your Firefox profile cannot be loaded. It may be missing or inaccessible'. Fiddled round a bit, finally uninstalled Firefox from the new machine and downloaded it again. Got the same error message, now no Firefox at all after carefully following such instructions as I could find. What the f*ck am I doing wrong? A year or so ago I transferred the Win 7 profile successfully to a Win 10 laptop. What has gone wrong now? Any suggestions most welcome.

Trying to migrate Firefox profile from Win 7 machine to new Win 10. Downloaded Firefox to new machine, confirmed that it worked, closed it.Using Troubleshooting feature, located active profile in old Win 7 machine, copied to USB stick. Closed Firefox on new machine, navigated to Profiles folder, copied the Win 7 file to it and deleted the existing file. Tried to start Firefox, got 'Your Firefox profile cannot be loaded. It may be missing or inaccessible'. Fiddled round a bit, finally uninstalled Firefox from the new machine and downloaded it again. Got the same error message, now no Firefox at all after carefully following such instructions as I could find. What the f*ck am I doing wrong? A year or so ago I transferred the Win 7 profile successfully to a Win 10 laptop. What has gone wrong now? Any suggestions most welcome.

Chosen solution

Hi, if the Profile names aren't an exact match, you need to copy the contents not the whole Profile.

If your question is resolved by this or another answer, please help other users by marking the best reply as Solved. Thank you!

Read this answer in context 👍 0

All Replies (1)

Scribe
Scribe
more options

Chosen Solution

Hi, if the Profile names aren't an exact match, you need to copy the contents not the whole Profile.

If your question is resolved by this or another answer, please help other users by marking the best reply as Solved. Thank you!