Hello,
I have exactly the same question.
According to the comments of the forum, people still use version 5.
As I see the Bugfix reports have been outdated for a long time and are not maintained.
Reading the posts makes me wonder which browser people are using, since the internal one is probably out of date. (according to comments on the forum)
And are there even people who still use ubot? If yes, how ? Are extensions necessary for this?
Best wishes