How to disable skype in Firefox browser?
Step 1
Click the Firefox button in the upper left corner of the Firefox window and select “Add-ons” to open the Add-ons Manager tab.
Step 2
Select “Extensions” from the left pane and your Firefox extensions are displayed in the right pane.
Step 3
Click the Skype extension’s name to select it.
Step 4
Click the “Disable” button if you just want to disable the extension or the “Remove” button if you want to completely remove it.
Step 5
Click “Restart Now” to restart Firefox and apply the changes if the Restart Now dialog pops up. Your tabs will be saved and restored.