Git sync fails on tor-browser

### Which version of floccus are you using?

5.2.3

### How many bookmarks do you have, roughly?

300

### Are you using other means to sync bookmarks in parallel to floccus?

No

### Sync method

Git

### Which browser are you using? In case you are using the phone App, specify the Android or iOS version and device please.

Tor browser 13.5

### Which version of Nextcloud Bookmarks are you using? (if relevant)

_No response_

### Which version of Nextcloud? (if relevant)

_No response_

### What kind of WebDAV server are you using? (if relevant)

_No response_

### Describe the Bug

* Works fine on firefox but fails on tor-browser
* Previously have used on tor-browser with nextcloud bookmarks. Used to work fine (~3 years back). Don't have nextcloud instance anymore
* I tried removing all profiles and recreating from scratch
* Tried with empty repo and also existing repo
* OS - Ubuntu 22.04

Let me know if more details are needed to debug. Thanks!

### Debug logs
```
2024-06-21T19:44:24.277Z Starting sync process for account floccus@gitea.balki.me:bookmarks-tor.xbel
2024-06-21T19:44:24.461Z onSyncStart: begin
2024-06-21T19:44:24.467Z (git) init
2024-06-21T19:44:24.468Z onSyncFail
2024-06-21T19:44:24.468Z Syncing failed with A mutation operation was attempted on a database that did not allow mutations.
2024-06-21T19:44:24.480Z onSyncFail
```

### Expected Behavior

sync working normal

### To Reproduce


### Debug log provided

- [x] I have provided a debug log file