Can I change the keyboard shortcuts for tab switching in Firefox?

How do I reassign the keyboard shortcuts for Firefox? I want to use ctrl+right/left to switch tabs. Is there a plugin for this, if Firefox doesn’t natively support this?

Answer

Here is what worked for me in March 2016 (Firefox 45):

1. 
   

   Install the keyconfig addon from the keyconfig download page and restart.

   
   

   The addon file is unsigned, so to be able to install it, I first had to enter about:config in the address bar and set xpinstall.signatures.required to false.

   
   


2. 
   

   Go to Addons -> keyconfig -> Preferences.

   
   


3. 
   

   There are no "Previous Tab" and "Next Tab" entries by default, but you can add them by clicking Add a new key and using the following code snippets (thanks to the author). The "Global" checkbox can be left unchecked.

   
   
   
   
   • Next Tab: gBrowser.mTabContainer.advanceSelectedTab(1,true);
   
   
   • Previous Tab: gBrowser.mTabContainer.advanceSelectedTab(-1,true);
   
   
   
   


4. 
   

   Assign whatever keys to the "Next Tab" and "Previous Tab" actions.

   
   

(The Customizable Shortcuts addon didn't work for me, as it didn't have entries for Next Tab and Previous Tab.)