TabSlinger by Marcus Reid

TabSlinger adds a fast way to move many tabs at once between your own Firefox devices. Select the tabs you want in your current window or use the “all tabs in this window” option, pick a target device from the popup, and send. On the receiving device, you’ll see a small notification showing how many tabs arrived. You can open them immediately, open all pending later from the popup, or turn on auto-open in Options with a safety cap so you don’t flood your browser. Each device registers a friendly name so it’s easy to choose the right target. The add-on uses Firefox’s built-in storage.sync to pass the list only through Firefox Sync—no third-party servers and no tracking. A simple history and pending queue help you keep track of batches you sent or received. Everything runs locally in your browser and nothing leaves your account.