After installing Tabs on Bottom 0.5 to correct for the otherwise irremediable "tabs on top" switch by Mozilla in an earlier version, I thought I had my appearance preferences to my liking. The top of my browser page stacked vertically as follows:
Title Bar
URL Bar (including Search bar)
Bookmarks Toolbar
Tabs

However, with the latest update, every time I open or reopen the browser, the Bookmarks Toolbar appears between the Title Bar and the URL Bar. This forces me to re-customize to fix same — but it only holds for the given session.

Any thoughts on how to get the desired configuration to stick?

Edit: Apparently the problem is associated with the Tabs on Bottom 0.5 Add-On. Another user posted the same problem yesterday. His workaround is similar to the one I discovered. It isn't clear if or when the purveyors of the Add-On will make the necessary repairs.

Last edited by grelber; 02/27/15 10:46 AM. Reason: New information