Yes I did. The main problem with GTK3, for me, was with the Bookmarks Toolbar.
Since I have a 32" external monitor, I have a lot of folders on the Bookmarks Toolbar. The name of the folder is also included. The problem with GTK3 comes at the end of the Bookmarks Toolbar where the overflow asterisk is.
When I left clicked on the asterisk and the drop down context window opens up showing the rest of my named folders, if I wanted to take one of the folders and drag it onto the horizontal Bookmarks Toolbar, it could not be dragged there.
With GTK2, using the same steps as above, any folder in the context window could be dragged onto the horizontal Bookmarks Toolbar. So when I manually install a new version of 64 bit linux Pale Moon from the link below, I always choose GTK2.
https://www.palemoon.org/download.shtml