Why is Firefox now wiping my profile with each update?
When I upgraded to Firefox 30.0, all of my data was wiped: history, add-ons, bookmarks etc. It's not just that Firefox is using a different profile - my Profiles folder had nothing in it.
Exactly the same thing has now happened in upgrading to 31.0.
Opaite Mbohovái (4)
ok make a backup of your data folder before each update but i updated my fire fox alot it didn't delete my profile any time
Separate issue; Update your Shockwave Flash v14. http://get.adobe.com/shockwave/ The link for Flash Player is: http://get.adobe.com/flashplayer/
These can't get your data back, but will help in the future.
These add-ons can be a great help by backing up and restoring Firefox
FEBE (Firefox Environment Backup Extension) {web link} FEBE allows you to quickly and easily backup your Firefox extensions, history, passwords, and more. In fact, it goes beyond just backing up -- It will actually rebuild your saved files individually into installable .xpi files. It will also make backup of files that you choose.
OPIE {web link} Import/Export extension preferences
Did you look in the profiles folder? Open the file browser / explorer on your computer. Depending on your system, you need to find this folder; C:\Users\=<User Name>=\AppData\Roaming\Mozilla\Firefox
Look on your desktop. Do you see a folder Old Firefox, or something like that?