Here is a list of accelerators and how-to related to Firefox. It will be maintained and update regularly.
|Linux + Windows||Mac OSX|
|Enable or disable Status Bar||Crtl + /|
|Firefox Developer Tools||Ctrl + Shift + K||⌘ + ⌥ + K|
|Web Console||Ctrl + Shift + J|
|Responsive Design View||Ctrl + Shift + M||⌘ + ⌥ + M|
Move Sessions Between FireFox
If you open several tabs and windows open, you may move them to your new Firefox by copying sessionstore.js.