Regex Search & Replace
Regex: T ultimate Regex search ⭐️
Simply use Regex on any page with familiar Ctrl+F visuals.
✓ Ctrl+Shift+F search field ✓ Regex query searching
✓ Permanently marking up or replacing anything.
✓ Open Source
Regex Search & Replace: Ultimate Regex Search
Regex Search & Replace is a Firefox add-on that provides the ultimate Regex search and replace functionality. With familiar Ctrl+F visuals, you can easily search for text using regular expressions on any web page. The add-on offers features like a searchable query field, highlighting search results, and the ability to permanently mark up or replace text. It is open source and available on GitHub for contributions.
Add-on stats
By: code-for-charity
Creation date: 2023-03-27
Weekly download count: 12
Firefox on Android: Yes
Risk impact: Moderate risk impact 
Risk likelihood:
Manifest version: 2
Permissions:
- storage
Size: 388.17K
URLs: Website
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Add-on summary
Regex: T ultimate Regex search ⭐️ Simply use Regex on any page with familiar Ctrl+F visuals.
✓ Ctrl+Shift+F search field
✓ Regex query searching
✓ Number of results per tab ✓ Scroll screen to previous/next result ✓ Highlighting search results
✓ Permanently marking up or replacing anything.
Open Source! https://github.com/code-for-charity (where we work hard daily.) Please check out the source code & contribute 🎈
The Extension runs offline
User reviews
I'd like it to focus on the regex input automatically. 🙂
by Attacktive, 2025-01-14
It only works in simple Pages, that is, without frames or iframes or any other complex structure.
by Cyberknight, 2024-09-18
Would be nice to have the Manifest V3 "Only When Clicked" permission option
by Firefox user 17995068, 2024-04-18
Add-on safety
Risk impact
Regex Search & Replace requires a few sensitive permissions. Exercise caution before installing.
Risk likelihood
Regex Search & Replace has earned a fairly good reputation and likely can be trusted.
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