If you are using nightly builds of Firefox 4 you may came to know that Panorama shortcut Ctrl +E found not working, there you go! Mozilla changed Firefox Panorama shortcut yet again and the new one is Ctrl+Shift+E.
Users accidentally activating panorama by hitting Ctrl+E shortcut hence Mozilla changed the shortcut to Ctrl+Shift+E which is more discomfort to activate and use for any user much like user uses Ctrl+Alt+Del to bring up task manager.
But Ctrl+Shift+E is the shortcut for Adblock Plus add-on preferences, from Ctrl+Space to Ctrl+E to Ctrl+Shift+E . Once Firefox 4 Beta 10 released, you need to use this shortcut to reach panorama. Ctrl+E shortcut still works Firefox 4 Beta 9 version though.
Panorama Keyboard shortcut
- for Windows is Ctrl+Shift+E
- For Mac is Shift-Cmd-E
Still you can use Change Panorama Shortcut add-on to change Panorama shortcut according to your needs.
Check the discussion on Bug 624588 for more details.