I want to use regular expressions to search a page in Firefox.

Is this possible?


4 Answers 4


Fastest Search [no longer available]

Best text search on page/in tabs - count/regex/match distribution/list/find-as-you-type. Fastest Instant web/history search in URLBar. Best custom search and multi-tab preview in any box or for selected text. Autocopy, dnd link/image.

  • 18
    I won't put -1, but to me, this addon is too much bloated... Sep 22, 2013 at 9:25
  • Couldn't make it work on Mac Feb 16, 2016 at 12:04
  • 9
    No longer compatible.
    – Jacktose
    Aug 23, 2018 at 23:26
  • 14
    Not available anymore
    – wjandrea
    Jul 17, 2019 at 16:47

Since the other alternatives offered here have been left in the dust of technological change, and rendered incompatible with latest versions, I'll drop the two current compatible addons I found (though I haven't tested them):

  • Regex Search
    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
  • {find+}
    {find+} is a simple Find-in-Page extension hosting a the ability to search a web page or document by regular expression. It has been designed to look and behave much like the CTRL-F function, but extended to provide a feature-rich and robust user experience with the aim of completely replacing the native Find-in-Page tool.
  • 1
    Neither "Regex Search" nor "{find+}" give results for \p{IsCyrillic} on page full of text in Russian.
    – izogfif
    Jan 29, 2019 at 6:59
  • 3
    Upvote only for {find}+ since it acts as find but regex search doesnt highlight in the page.
    – Mark
    Aug 14, 2019 at 10:11
  • 2
    @Mark To clarify your comment, {find}+ does highlight regex search result in the page. The alternative extension Regex Search may not – which is what you say.
    – tanius
    May 10, 2020 at 11:17
  • @Mark Regex Search does highlight on the page
    – Lubo Kanev
    Apr 1, 2021 at 9:51

Yet another option matching my needs very well is Regex Find (no long available on Firefox marketplace) which is open sourced. It's simple, though it may not be so polished.


  • 3
    I honestly prefer this way more to @Oleg's answer of Fastest Search. IMO it's super bloated and kinda confusing, I love the fact that Regex Find is integrated into the native Firefox search
    – Jeeter
    Jul 13, 2016 at 19:57
  • 5
    Does currently not work with Firefox 50: github.com/mortalis13/Regex-Find/issues/6
    – tlo
    Nov 26, 2016 at 20:35
  • @tlo: some instructions in the about field on how to run it on current versions, if you like to live adverturously. Jul 27, 2018 at 0:16
  • 8
    Not available anymore
    – wjandrea
    Jul 17, 2019 at 16:47
  • The page doesn't exist anymore!
    – Kiran
    May 26 at 11:41

XUL/Migemo (no long available)

This includes 3 features about the find toolbar. First, the dictionary-assisted find. Second, more customizable Find Toolbar. Third, the highlight feature like Safari 3.

  • 1
    Not available for FF6 yet ...
    – Myer
    Aug 17, 2011 at 19:37
  • 1
    How do you activate the regex search functionality with XUL/Migemo?
    – user48604
    Sep 2, 2011 at 14:19
  • 4
    It seems development on this plugin has stopped. The last updated date on the addon page is July 13, 2010. Dec 17, 2012 at 17:50
  • 1
    yeah shame, not available for latest versions of Firefox! any alternatives?
    – Charbel
    Mar 27, 2014 at 9:23
  • 1
    @Charbel: There is a good chance that XUL/Migemo can still be forced to work. A quick google for "firefox add-on compatibility" got me this article, but there are many more useful results.
    – harrymc
    Mar 27, 2014 at 11:51

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