- Updated the HTTPS method for detecting DID to use the new path (`/.well-known/atproto-did`) and format (served as `text/plain` and just the DID itself)

- Small fix for a bug introduced in `1.4.0` that occurs when the browser puts idle extensions to sleep

- Migrate/refactor everything from `content.js` into a self-contained `background.js`
- Swap `activeTab` permission for `tabs` so that we can drop the `<all_urls>` permission
- Remove permissions for "management" as it is not needed
- Migrate Firefox to Manifest v3 (but this means the minimum FF version is now 109)
- Input validation for domains and DIDs (security enhancement)
- Replace `staging.bsky.app` with `bsky.app`

### Added

- Support for alternative HTTPS method for detecting DID

### Changed

- Remove permissions for "tabs" as it is not needed