API Reference
A consolidated reference for the extension APIs. Status legend:
- ✅ Functional — works as expected.
- 🟡 Partial — works with caveats (see notes).
- ⬜ Stub — present but returns defaults / no-op.
Userscript GM_*
| API | Status | Notes |
|---|---|---|
GM_getValue / GM_setValue / GM_deleteValue / GM_listValues | ✅ | SharedPreferences-backed, per-script namespace |
GM_xmlhttpRequest | ✅ | Via OkHttp; full callback set |
GM_addStyle | ✅ | |
GM_setClipboard | ✅ | |
GM_openInTab | ✅ | |
GM_log | ✅ | |
GM_getResourceText / GM_getResourceURL | ✅ | |
GM_registerMenuCommand / GM_unregisterMenuCommand | ✅ | Floating-window menu |
GM_openScriptWindow / GM_updateScriptWindow / GM_closeScriptWindow | ✅ | WebToApp-specific |
GM_info | ✅ | |
unsafeWindow | ✅ | Equals window (no sandbox) |
GM_notification | 🟡 | Logs only; no system notification |
@grant gating | ⬜ | All APIs exposed regardless of declared grants |
GM.* (Promise) | ✅ | Mirrors all of the above |
Chrome chrome.*
| Namespace | Status | Notes |
|---|---|---|
runtime | ✅ | Messaging, lifecycle, getURL, getManifest |
storage | ✅ | local/sync/session; managed no-op |
tabs | ✅ | Core CRUD + events |
scripting | ✅ | Dynamic content script registration |
cookies | ✅ | |
alarms | ✅ | |
declarativeNetRequest | ✅ | block/allow/redirect/modifyHeaders/upgradeScheme |
downloads | 🟡 | download functional |
webRequest | 🟡 | onBeforeRequest filtering via native bridge |
i18n / notifications / permissions / contextMenus / commands | ✅ | |
webNavigation / extension / idle / tabGroups | 🟡 | |
action / sidePanel | 🟡 | |
windows / management / topSites / fontSettings | ⬜ | Stubs |
identity / history / proxy / privacy | ⬜ | Stubs |
system.cpu/memory/display/storage | ⬜ | Stubs |
bookmarks / offscreen / tts | ⬜ | Stubs |
browserAction / pageAction (MV2) | 🟡 | Compatibility aliases |
This table is a living document
The functional/stub status is being verified API-by-API. When in doubt, test against the current build.