Let user change icons displayed in browser tabs

[onekev]

Provide an option in a right-click menu to allow the end-user to change the icon displayed in browser tabs in the Firefox browser.  This would be comparable to the "Properties >> Web Document >> Change Icon" sequence available in Windows 10 for changing icons shown on the desktop. 

[Jon]

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[Cougarhawkwood]

Anything would be better than what they’ve done to ipad ios. The solid color blocks making using the browser a nightmare.