**Describe **
e.g. I would like to search for an exact word say open but I do not want to find opens or opened.

To Reproduce
Steps to reproduce the behavior:

1. Go to URL 'https://github.com/philc/vimium/wiki/Tips-and-Tricks'

Here's what I tried. I didn't get what I wanted

• open\b\r
• \<open\>