Novaliss so backup your Bookmarks
I didn't use Vanadium regularly so far, so I still have no bookmarks there. I'm just grappling with Floccus to get rid of a possible loss of bookmarks, if something unforeseen would happen.
Novaliss But be adviced: some flags will soft-brick Vanadium if toggled
Novaliss Remember that these are developer flags availiable from Chrome, not put in there by the GrapheneOS team.
The dark mode option is the only one I've toggled, ich don't think this would brick Vanadium or would make security issues and if, there are a lot of alternative browsers. A browser should match my flavour in optics and usability and I can't stand glaring white backgrounds on websites, it hurts my eyes, it hurts the OLED screen and it hurts the battery.