Pretty much everything clickable gets tagged. Buttons, text inputs, links, etc. If what you want to click on has a word in it, you can press '/' and type the wo

Pretty much everything clickable gets tagged. Buttons, text inputs, links, etc. If what you want to click on has a word in it, you can press '/' and type the word then hit enter to click it so that would probably be what I would do if there was ever a missing tag. That's also how you can highlight text. This is for vimium at least.