Search in HTML or Highlight using Regular Expression (REGEX) and output the results using template, with saving profiles functionality, you need to know 'basic' Regular expression to benefit from this plugin

Note that add-ons are blocked on the following domains:
accounts-static.cdn.mozilla.net
accounts.firefox.com
addons.cdn.mozilla.net
addons.mozilla.org
api.accounts.firefox.com
content.cdn.mozilla.net
content.cdn.mozilla.net
discovery.addons.mozilla.org
input.mozilla.org
install.mozilla.org
oauth.accounts.firefox.com
profile.accounts.firefox.com
support.mozilla.org
sync.services.mozilla.com
testpilot.firefox.com

Install

• License: MIT License
• Weekly downloads: 42
• Average daily users: 1772
• Rating: 3.1731/5 of 52 ratings
• Created: 2017-08-10 03:54:08
• Last updated: 2019-07-13 08:30:11
• Homepage: https://github.com/Mohd-PH/RegexSearch/
• Support site and email
• Orig: https://addons.mozilla.org/en-US/firefox/addon/regexsearch/
• API: {cb08faed-9460-474a-ba0b-d98b13b5e001}