By default, TopMenu fully
supports GTK2 applications and, according to its
wiki,
GTK3
is partially supported, though I'm not sure what "partially" means
because I didn't encounter any issues. Furthermore, there are
additional plugins for Qt4 and Mozilla (Firefox, Thunderbird and Zotero)
applications.
Unfortunately TopMenu doesn't
come with multi-monitor support (only one applet can be used, so if you
have two monitors with two panels at the top, you can only place TopMenu
on one of them), doesn't support transparency and most importantly, it
doesn't play very nicely with many Xfce themes
- in my test, the Xfce Panel applet uses the wrong background color
with almost all the themes I've tried so keep this in mind if you want
to give it a try.
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