How to add tags to bookmark in Mozilla Firefox Browser ?
Click on the blue star at the right side of search bar. We
can see the "Edit This Bookmark" option.
Tags can be added using two options,
Option 1: Enter the tag name to categorize the web page bookmarked.
Option 2: You can also change tags by selecting on the downwards arrow option and tick the tag checkbox under which you need to categorize your bookmark. Finally click Done to save the changes.