First, the ad-block works pretty the same way. Firefox’s better, but there are practically no difference. Second, the split view is great, and I didn’t see anything like it in Firefox. The actions are really cool, and I am starting to use them a lot, there are scripts to what you can do on a link. The search engine is beautiful. You can add what you want to see as a search engine in the search box with a great dialog. If you mark a web address, konqueror recognizes it automatically and offers you via context menu to open it, even if it hasn’t a link. It is pretty cool, and really better on the everyday browsing.

Two things I love in Firefox: Live bookmarks and Dom Inspector.

Infortunately, we still lack of a good extension set for Konqueror. I use Stumbleupon and mouse gesture for example.

Maybe the konqueror C++ Api is to hard to use.
A Ruby (for example) wrapper around KDE 4 C++ API would be useful.

Konqueror seems to render pages much quicker than firefox ever has however, the tough thing about Konqueror is that it doubles as a file manager. Thats where I think its downside is. It seems its trying to be two application rolled into one.

Granted, file managing and web surfing share some common similarities as far as “locations” are concerned but I just feel that the two be separate. For me, I use firefox when I have to but if I don’t, I use Konqueror.

I have also switched from Thunderbird to KMail on Linux for the same reasons (plus KMail has a lot more functionality). Thunderbird is just too slow for me. I’ll use it at work (on Windows) but I try to limit the number of GTK applications I use because of a) its ugly b) its slow (for me anyways).