User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2b1) Gecko/20091029 Firefox/3.6b1 (.NET CLR 3.5.30729) Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2b1) Gecko/20091029 Firefox/3.6b1 (.NET CLR 3.5.30729) My suggestion is to ignore accent marks in letters when searching for tabs. For example, if I have this Wikipedia page open with 10 other tabs, searching for Hernan will not find it. I'd have to search for 'Hernán Cortés' and there's no easy way of creating accent marks on a U.S. keyboard. http://en.wikipedia.org/wiki/Hernán_Cortés Copied from my post at http://forums.mozillazine.org/viewtopic.php?f=23&t=1572095&p=7953235#p7953235 Reproducible: Always Steps to Reproduce: 1. Enable tab previews. browser.ctrlTab.previews to true via about:config 2. Open up three tabs. 3. Open up this page http://en.wikipedia.org/wiki/Hernán_Cortés (or any page that has accent marks or non-US characters. 4. use Ctrl+Shift+Tab to show the Ctrl tab preview 5. Search for Hernan Cortes (note, not using any accents) Actual Results: No results are shown. Expected Results: The Hernán Cortés tab should be selected.

Gary, please take a look at this bug. I'm searching for the search function used by this Ctrl + Shift + Tab feature. Someone from #firefox said there are many search functions implemented. For example, Ctrl + F has a different search function ...

The search tabs feature is gone (bug 670684).