Check whether the local Firefox extension is connected to this MCP server.

List Firefox tabs with stable IDs, exact URLs, titles, window IDs, and current group IDs.

List Firefox tab groups, optionally restricted to one window ID.

List Firefox windows with per-window tab and group counts, and each group's title and size. Use it to pick a target window for cross-window moves.

Open a new Firefox window, optionally with an explicit http(s) URL, without stealing focus by default; returns the verified window ID and first tab.

Open an explicit http:// or https:// URL in Firefox, inactive by default, and return the verified tab ID and window ID.

Create a new, exactly titled Firefox group from one or more ungrouped tabs in the same window, then verify every tab. Fails if an exact group already exists.

Move one exactly identified Firefox tab into an existing, exactly named group in the same window and verify the result. Ambiguous matches fail safely.

Move one exactly identified Firefox tab to a target position within its own window and verify the result. Ambiguous matches fail safely.

Remove one exactly identified Firefox tab from its current group and verify the result.

Pin one exactly identified Firefox tab and verify it.

Unpin one exactly identified Firefox tab and verify it.

Duplicate one exactly identified Firefox tab and verify the new tab's URL and window.

Set the color of one exactly named Firefox group and verify the resulting color.

Move one exactly identified Firefox tab to another window (without grouping it) and verify the resulting window.

Open a batch of explicit http(s) URLs in the background and put every new tab into one exactly named group in one atomic operation (creating the group only if missing); on failure, already opened tabs are closed again.

Wait until the Firefox extension reports a tab as fully loaded (event-driven; returns immediately if the event already arrived). Use it after open/duplicate to know when the page finished loading.

Return the currently active tab of the focused Firefox window (or null if none).

Restore the most recently closed Firefox tab or window (or a specific session) and return the restored tab and window IDs.

Move a batch of exactly identified Firefox tabs into one existing, exactly named group in one verified operation (cross-window supported with an explicit windowId).

Close a batch of exactly identified Firefox tabs by their tabId and verify that Firefox no longer reports them.

Close every tab in one exactly named Firefox group (and remove the now-empty group) after verification.

Move every tab of the source group into the target group in one verified operation, then remove the now-empty source group.

Rename one exactly named Firefox group to a new exact title and verify the result; fails if the new title already exists in the window.

Collapse or expand one exactly named Firefox group and verify the resulting collapsed state.