Index of repositories is held locally, so if you use the same repository with multiple machines, they have to rebuild their index every time they switch.
I also have family PCs i wanted to backup too, but borg doesnt support windows, so only hacky WSL would have worked.
But the worst might be the speed of borg… idk what it is, but it was incredibly slow when backing up.
try SkipRedirect, can break some things though, but rare.
Only works for hijacked links where the extension can grab the original link somehow of course.
For general Ad Links, there is FastForward, though i feel it hasnt been on the same level of maintenance since UniversalBypass closed down and they forked it.