How can I search for text in all tabs in Firefox?
Just put a % yoursearchtext in the adress bar of firefox. For example: % firefox You will get a dropdown box with all results.
if you don't find an alternative to this extension, you may still be able to use it in your version of firefox by bumping the max version. it's something I do quite a lot as I use the latest nightly builds from the trunk (3.7*) and branch (3.6.6) If an extension is relatively recent it should work in the 3.6* builds. Here's how:
Open the 'find in tabs.xpi' file with a zip like utility, I use 7zip but winzip/peazip/winrar etc will work.
Open the 'install.rdf' file in the archive with a text editor and find the line
3.5.*
Replace the value of 3.5.* with the version of firefox you are using; This can be found if you open the help menu and click the about link.
Save the file back into the xpi archive and close the archive.
This should now allow the extension to work in firefox.
There are other ways of doing this, for example the extension MR Tech Toolkit has an option for overriding compatibility checking. it can also be disabled in about:config Extensions . checkCompatibility - MozillaZine Knowledge Base
The Fastest Search addon allows you to do simple text (whole-word supported) or regular expression search in all tabs or only the selected/filtered tabs. It has many other useful features as well that'll save a lot of time for everyday browsing/searching.