Google requires migration to MV3

[LucasHocker]

MV3 makes massive changes to permissions and background pages get replaced by service workers. This will require a large amount of changes to core injection logic and has a high risk of causing disruption. Google has traditionally taken anywhere from 1 day to 2 weeks to approve an update. With the new requirement to not include any remote code, a bug could mean all PowerUp users are down for 2 weeks.

[LucasHocker]

https://developer.chrome.com/docs/extensions/mv3/intro/mv3-migration/