There are some 'homemade' adaptations of ABP for KM74-75, yes. Current are here
1) This is just a crutch instead native addon. It creates additional UI elements to emulate 'browser.xml'. Not very convenient.
2) More important - that crutch isn't compatible with newer KM 76 so we cannot use 'Live Block page items' option there.
-protocol cannot be handled by K-Meleon for now. Well, we can add filters ans subs manually, but it's very inconvenient for novices and unexperienced users.
Years ago Wladimir Palant created small dll (kplugin - KM-specific plugin) that made buttons for KM's toolbar and status bar with all the options available.
So our wishes and prayers are directed to anyone who can reproduce such an integration.