Open Opera and navigate to the page you want to set as your browser home page, click on the + button and then click on Add to Home Page. An icon is now added to your device's home page, click on this, Opera opens up and goes to your browser Home Page.
Setting the user agent string for one so every website doesn't think you are mindless bot. Oh wait it's so Opera can be it's awesome self and you don't have to look at squashed pages with graphics overlapping or covered up links etc. Them you can actually allow the browser to do it's job.
Does Chrome support extensions on Android? Opera is based on Chrome now ... so if Chrome can't support extensions on a certain platform, then Opera can't either.
Dont think you can change storage folder for Opera for Android(without logging on as root), because of this i think is just a waste space on a Android device. I have used Opera as my main browser for 15 years, I will most likely end my Opera use as i think this should be easy "fix" but Opera jut dont bother. I am quite mad and I have been known for fight lost causes, I also boycott websites that use Adobe Flash because Adobe make Flashplayer for Android.
I do hope that people follow my lead, then things may change.