Tab Rename — jr

Give any tab a custom name and revert to its real title anytime. Rename from the
toolbar popup or by right-clicking the tab. The name sticks even when the page
tries to change its own title, and survives reloads.

Description:
Tab Rename lets you rename browser tabs to whatever you want.

• Click the toolbar button, type a name, hit Rename.
• Or right-click a tab → "Rename tab…".
• The custom name holds even when a page rewrites its own title (chat apps,
  unread counters, single-page apps) and survives reloads and in-page
  navigation.
• Revert restores the page's real, current title. "Revert tab name" only appears
  in the tab menu when that tab actually has a custom name.
• Custom names last for the browser session and are cleared when you close the
  tab. Nothing is ever sent off your device.