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Many years ago we had a quesion How do I search a page using a regular expression in Firefox? with several answers. None of the suggested extentsion are compatible with recent ("Quantum") versions of Firefox, so once again:

How do I search a page in Firefox using regular expressions?

Chris H
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  • The [regexserach](https://addons.mozilla.org/en-US/firefox/addon/regexsearch/?src=search) extension highlights and can check whether text is on the page but doesn't appear to be capable of scrolling to the result – Chris H Apr 25 '18 at 08:35

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How do I search a page in Firefox Quantum using regular expressions?

You can use {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.

Our principle is simple, to deliver a reliable, robust, repeatable, performant, and native-like tool for the software and web development industry. Perfection is simply not good enough.

Looking for more information? Check out our awesome Wiki by clicking the link to our website below.

A Small Notice:

Since {find+} is still in beta, you may experience bugs or issues while using the extension. We are hard at work fixing these issues, but we encourage you to continue using our extension in the meantime. You can keep an eye on current issues in progress by monitoring our GitHub page.

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Source {find+}

Community
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DavidPostill
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  • Very nice, now if only I could map it to `ctrl+F`... A note for anyone like me testing and thinking it doesn't work: it only works on pages loaded after you installed it (not really surprising in hindsight) – Chris H Apr 25 '18 at 10:41