User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:1.8.0.1) Gecko/20060111 Firefox/1.5.0.1 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:1.8.0.1) Gecko/20060111 Firefox/1.5.0.1 See https://bugzilla.mozilla.org/show_bug.cgi?id=332298 (part copied and updated from that entry) Heavy tabbed browser users, fixed width tabs, tabbar overflow handling, are an important roadmap issue, eg see http://wiki.mozilla.org/Tabbed_Browsing/User_Interface_Design A working vertical tabbar capability should be seen in that context, it's a valuable way to use firefox tabbed browsing. I can't speak for others, but for me its a critical usability feature, available in Opera, and if not supported I would probably not find an alternative browser easily usable. Right now I'm using a prefs.js "hack" from Mozilla. But since vertical tabbar is almost at the point of "could nearly be working" now, it makes sense to get it working the rest of the way. Vertical tabbar capability exists in Firefox and is used. It just doesn't work quite properly right now, it has a few issues that horizontal tabbar doesn't, mostly because it's not properly integrated. If it were, then likely other extensions would better support it too. I feel that in view of its usefulness, it should be a tabbar option and not just rely upon what Simon Bünzli (probably accurately) calls a "hack". Simon Bünzli suggests that the JS in the Wiki mostly works due to the Mozilla community, and that this should therefore be filed as an enhancement request. If so, it's a serious one, because for heavy tab users, vertical tabbar can be a very valuable device for efficient browsing, presenting the Firefox user with the maximum number of tabs in one row/column. Thanks. Reproducible: Always Steps to Reproduce: n/a - enhancement request Actual Results: n/a - enhancement request

*** This bug has been marked as a duplicate of 218280 ***