1 day auto backup triggers every 2 hours

[ShingenPizza]

Describe the bug An auto backup setting of 1 day triggers every 2 hours instead.

To Reproduce

1. Go to STG options, to backup tab
2. Set auto backup to 1 day.
3. Wait and observe how often do those auto backups actually happen. For me it's every 2 hours.

Expected behavior A setting of 1 day should cause a backup to occur every 1 day.

Desktop (please complete the following information):

• OS and version: old Win 7 install, and separate Windows 10, more or less updated
• Firefox version: ~89 - 99.0.1
• Simple Tab Groups version: 4.7.2.1 (and idk which previous ones)

Additional context I tried changing it to several different values multiple times - all that i checked seem to work just fine except the 1 day one. I restarted my browser and PC, it did not help. It's been happening for, it seems, 6 months now.

[grahamperrin]

See also #883, which was closed but not fixed.

[mh182]

The backup process is currently a PITA. Each hour my browser pop-ups the Firefox download and the KDE notification about a downloaded file.

Once a day would be fine, but during the day and video calls ... really annoying.