Since there is no adblock for Jolla in their shop and I was pissed in some apps about too annoying ads I thought about doing an adblock app for Jolla. Long story short, I couldn’t figure out how to do an adblock app but how I could do a systemwide adblock solution via a proxy (privoxy). The bad thing is that you have to manually install that rpm and it just can be stopped via root shell (systemctl stop privoxy). On the other hand I tried to make it as independent as possible for need of user action. It searches for new adlbock lists if your Jolla is connected to WLAN and otherwise it just hangs in there and waits for it. There is no more to do than installing and sometimes being in a WLAN to get adblock lists updated.
If you want to try, go ahead: privoxy-3.0.23-1.noarch
Here the scripts for building: https://github.com/hamsterbacke/SailBlock