I’ve always liked how Opera used to put the tab bar at the bottom.  I’ve always configured firefox to be the same too.

I recently updated to Firefox 3 rc3 and I lost this setting.  After a little searching I found that you simply need to add

/* Puts the tabbar at the bottom of firefox */
#content > tabbox { -moz-box-direction: reverse; }

to the following file.

C:\Documents and Settings\<username>\Application Data\Mozilla\
Firefox\Profiles\xxxxxx.default\chrome\userChrome.css

You may need to create the file as it doesn’t exist by default.

Once you restart firefox, the tabs are at the bottom again.

Well I thought I was going crazy.

Today I installed foxmarks on my Windows OS, hours later I tried to install it under linux and it kept failing.

I was really losing my patients. I could not figure out why it wasnt working. I disabled all other plugins, closed all other tabs, everything I could think of.

Finally after searching for too long I found this post on the ubuntuforums.

It shows lots of other people were having the same problem.

The solution is to add

64.50.236.214   releases.mozilla.org

to you /etc/hosts file.

It appears that mozilla are having some issues with either the DNS entry or the servers behind releases.mozilla.org

I just know that this change will cause problems in the future though.