Thunderbird 78.xxx Table border add-on -- 2

Thunderbird 78…. add on to show table borders when you copy from Excel into an e-mail. Option 1. Add On that changes default behavior when pasting from Excel so that border size is 1, instead of 0. Option 2. Add On that adds an item to the context menu (right click menu) when your cursor is in a table, so that the border size of a table can be changed very quickly. I know how to change border size of tables using Format menu, but it requires way too many clicks.