I want to use regular expressions to search a page in Firefox.
Is this possible?
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4Please change your accepted answer. The one you picked years ago is about an extension that isn't being developed anymore.– user33758Jan 8, 2016 at 1:20
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See also these similar questions: How can I search for regular expressions within webpages using Google Chrome or IE? and How to run a regex search on Google Chrome or Firefox?– iconoclastNov 6, 2022 at 18:19
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4 Answers
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.
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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.
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1Neither "Regex Search" nor "{find+}" give results for
\p{IsCyrillic}on page full of text in Russian.– izogfifJan 29, 2019 at 6:59 -
2Upvote only for {find}+ since it acts as find but regex search doesnt highlight in the page.– MarkAug 14, 2019 at 10:11
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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.– taniusMay 10, 2020 at 11:17
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Yet another option matching my needs very well is Regex Find which is open sourced. It's simple, though it may not be so polished.
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3I 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– JeeterJul 13, 2016 at 19:57
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5Does currently not work with Firefox 50: github.com/mortalis13/Regex-Find/issues/6– tloNov 26, 2016 at 20:35
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@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
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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.
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1How do you activate the regex search functionality with XUL/Migemo? Sep 2, 2011 at 14:19
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4It 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 -
1yeah shame, not available for latest versions of Firefox! any alternatives?– CharbelMar 27, 2014 at 9:23
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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.– harrymcMar 27, 2014 at 11:51