So I read of the firefox profile taking up a lot of space and, therefore taking a long time to backup. I guess this only applies to people who have a persistent /home and /opt but something I found that you could do:
either make another partition OR another folder in one of your persistent directories (home or opt) also preferably owned by "tc" and in the "staff" group. or at least be writeable.
in home/tc/.mozilla/firefox/ edit the "profiles.ini" file.
Change "IsRelative=1" to "IsRelative=0"
Change the "Path=" line to your new chosen partion/directory
copy over all of your old profile files to this location
or run firefox for the first time and it will be created there
basically, it moves your profile.
as long as this directory isn't on .filetool.lst or IS on .xfiletool.lst
it won't be backed up, yet still will be permanent.
That way you can keep your 90 days of history and that giant urlclassifier3.sqlite file and everything else if you want lol
. If you have the space in the first place. this was just an interesting thing I did so...thought I'd share.