To everyone using FF 67 stuck with iCloud saying you need to install the add-on: Go into your Firefox App Data directory and open the profiles.ini text file. Then move the line "Default=1" into the section of the profile you are currently using. That fixed it for me.

Nice app

super

Will not download bookmarks for Firefox
Installation aborted because the add-on appears to be corrupt.

kelihatan bagus saya baru mau coba