In some windows, Firefox puts the New Tab "+" button to the left of my tabs instead of the right. This seems to be more likely to happen when it re-opens windows from a p… (tuilleadh eolais)
In some windows, Firefox puts the New Tab "+" button to the left of my tabs instead of the right. This seems to be more likely to happen when it re-opens windows from a previous session (not sure that's always true). In the window I'm typing this, the + tab button is to the left of my tabs, but if I open a new Firefox window, it is correctly to the right of the tabs.
Also, even in a window that incorrectly places the + tab button to the left of the tabs, when I go into Customize mode, it immediately and correctly shows it on the right. As soon as I close the "Customize Toolbar" window, it bounces back to the left edge.
As you can imagine, any button appearing in different places in different windows or at different times is annoying and breaks the UX. I also worry this may be a symptom of some more serious problem, though everything else appears to still work, even in those windows where the new tab button is in the wrong place.
Why does this happen and can I stop it? I have seen nothing about this posted here, but I've had this problem at least since version 12, and it's still happening in 13.0.1. I have the same problem on multiple computers, including after new installs. I don't use many add-ons -- LastPass, XMarks... I think that's it.
<This may be a duplicate post -- I thought I posted this earlier this morning, but after creating and confirming my new account to post to the forum, it never appeared, so now re-posting. Apologies if there is just a long lag and both appear. I think this is the more detailed posting though.>