"I'd do a backup of Firefox profile folders before trying this. In the Avast install directory is a WebRep\FF folder. Zip up the entire contents of that folder (not the folder itself) and then rename it changing the .zip extension to .XPI. You could then start Firefox Portable and drag-n-drop the XPI into the Add-ons | Extensions tab."I did that, I compressed everything in the FF folder to a zip file, and then changed the extension to *.xpi
Then I opened my firefox portable
www.portableapps.com downloaded, I click on "File" and "Open" (or Ctrl + o), I looked for. Xpi I did, I double clic to him and continued the installation steps as any other firefox extension. And it works. Thank you. God bless you. Thanks, Thanks