According to the docs on menus.create, the use of the ampersand (&) to create an access keys has only been implemented in FF 63 and later.
So, if I create a menu like with a title like this:
Plaster of &Paris Bagel and Cream Cheese Paperweight
In FF 63 and later, it will appear as:
Plaster of Paris Bagel and Cream Cheese Paperweight
And hitting the “P” key will activate that menu.
But in earlier versions, (FF ESR) it will appear as:
Plaster of &Paris Bagel and Cream Cheese Paperweight
What is the preferred solution to handle this display issue? (Obviously, I cannot implement the functionality pre 63)