| ActionPort | Toolbar button badge, icon, and popup control |
| AlarmsPort | Periodic and one-time background alarm scheduling |
| BookmarksPort | Bookmark tree read, write, search, and delete |
| BrowsingDataPort | Cache, cookie, and history clearing |
| CommandsPort | Keyboard shortcut registration and events |
| CookiesPort | Full cookie lifecycle management |
| DeclarativeNetRequestPort | MV3-native dynamic network interception rules |
| DownloadsPort | File download initiation and queue management |
| HistoryPort | Browser history search, addition, and deletion |
| IdentityPort | OAuth 2.0 flows and signed-in user profile |
| IdlePort | System idle state monitoring |
| ManagementPort | Installed extension introspection and lifecycle |
| MenusPort | Context menu item creation and events |
| NotificationsPort | OS-level browser notification display |
| PermissionsPort | Optional permission request and revocation |
| ScriptingPort | Runtime script injection into tabs |
| StoragePort | Unified access to all browser storage areas |
| TabGroupsPort | Tab group query and management |
| TabsPort | Tab query, messaging, and broadcast |
| UserScriptsPort | Isolated-world user script registration |
| WebNavigationPort | Navigation lifecycle event observation |
| WebRequestPort | Network request interception and observation |