this is too buggy and slow. use a bookmarklet instaed. make a new bookmark call it whatever you want and add as link: "javascript:(function(){var count=0, text, regexp;text=prompt("Search regexp:", "");if(text==null || text.length==0)return;try{regexp=new RegExp("(" + text +")", "i");}catch(er){alert("Unable to create regular expression using text '"+text+"'.\n\n"+er);return;}function searchWithinNode(node, re){var pos, skip, spannode, middlebit, endbit, middleclone;skip=0;if( node.nodeType==3 ){pos=node.data.search(re);if(pos>=0){spannode=document.createElement("SPAN");spannode.style.backgroundColor="yellow";middlebit=node.splitText(pos);endbit=middlebit.splitText(RegExp.$1.length);middleclone=middlebit.cloneNode(true);spannode.appendChild(middleclone);middlebit.parentNode.replaceChild(spannode,middlebit);++count;skip=1;}}else if( node.nodeType==1 && node.childNodes && node.tagName.toUpperCase()!="SCRIPT" && node.tagName.toUpperCase!="STYLE"){for (var child=0; child < node.childNodes.length; ++child){child=child+searchWithinNode(node.childNodes[child], re);}}return skip;}window.status="Searching for "+regexp+"...";searchWithinNode(document.body, regexp);window.status="Found "+count+" match"+(count==1?"":"es")+" for "+regexp+".";})();" without the first and last ""

It looks a little bit. Search for Search "chor[a-zżźćńółęąś]*\s?ryb" browsing "choroba", "chorobowych"

Sorry, but didn't work for me. After searching, there were never any matches. Turned off regex, tried, but nothing.

Why on Earth this add-on need "Access your data for all websites"? BEWARE. Regex Search does not ask so intrusive information.

Works great! I'm glad i find something like this....

It took me a while to find this add-on and I'm so glad I did. Seems to work well in my short 5 minute testing, i.e. I can search for regular expressions and jump through them using the up/down arrow keys. BTW, I'm not sure what Ckln was saying when he only gave this 2 stars because "On Firefox you can't have a shortcut to make the search pop up that's a shame." I use the default ctrl-shift-f and the search box pops up just fine in my Firefox.

this extension seems to be fine but I have major issues with it:
* On Firefox you can't have a shortcut to make the search pop up that's a shame.
* I'm unable to use built in shortcut as they conflict with my keymap ie Ctrl+Alt+R (on windows) is equivalent to Ctrl+AltGr+R which give me the char ™.
* Also the extention is using the «Access your data for all websites» which give this extention ability to read password and it could use the «Read the text of all open tabs» permission instead.

Is there a way to make this automatically highlight certain values on a particular page every time it loads with 0 input from the user?

It slows the browser A LOT when trying to find anything on a large web page (the most popular use case). It is probably because of "search as you type" functionality. It should be possible to deactivate it. The other possibility is to perform "search as you type" only for expressions longer than e.g. 3 characters. I dislike also a very broad permissions this addon requires. It can be a security concern. Addon named "Multiple Highlight" shows that it is possible to search RegEx without any permission requested.

I love it after playing with it for two minutes, however, if I could code, my "find" tool would be a static search box [always present] in the toolbar, the search word once typed would remain until changed, the search word would auto highlight in all pages without having to constantly click to get to work. I do thousands of word searches on thousands of web pages, and my kind of "find" would be great for people like me, we spend thousands of clicks to get the "find" thingy to fetch, I'd rather have my "find" thingy always open and working always. I hope I was clear in thought. Your 'copy all incidences to clipboard' is useless.

Exactly what I was looking for, perfect!

Great enthusiasm, kudos. However, a couple of futures are lacking in all similar FF addons:
1. It would be great if you could implement virtual scrollbar with indication where matches occurred within a page. Something like developer of the "HightlightAll" addon achieved. I know this is hard to implement since I'm using FF on Kubuntu, but it is a game changing feature.
2. Another one (if even possible), would be nice if there is an option for search window to stay open when we change tab.
Nevertheless, great addon. Keep up...

Really useful extension and best like it that I've found for searching webpages using regular expressions. The one thing I will note for the developer is that the last update wiped all of my saved expressions, some of which were quite complicated. I have noted to myself to save them elsewhere for future updates.

Great extension, works as advertised. Searches by regular expression, highlights and scrolls down to results.

Does what I expected - and supports perl compatible expressions.

Fantastic extension -- exactly what I was looking for. Unfortunately it was a bit hard to find, and it wasn't clear what hotkey could to used to access the search.