Pale Moon forum

Greetings. When i try to apply any firefox-based theme (deep dark https://addons.mozilla.org/en-US/firefox/addon/ft-deepdark/versions/9.5.4 for example)
the weird bug in adress bar appears:
clean 27.3 x64 portable palemoon.

This add-on may fix incompatible Firefox themes: https://addons.palemoon.org/addon/theme-shim/

Alternatively, you could look at your Pale Moon complete themes to find a native one that you like.
https://addons.palemoon.org/themes/