This is the addon-sendtab add-on. It contains:

• A program (lib/main.js).
• A few tests.
• Some meager documentation.

Now Obsolete

This addon has been superseded by the Synced Tabs feature of Firefox Sync (since bug 677372 was fixed in Firefox 50). A tab can be sent to a device by enabling "Open Tabs" in the "Sync Across All Devices" section of the "Sync" preferences, then right-clicking on the tab to send and choosing the "Send Tab to Device" option.