And, once again, I only just noticed that this is under the Mobile Feature Requests... (the references to Opera Mini should have been the hint but noo... apparently I wasn't paying even that much attention)
Nevermind my previous comments then.
Firefox has rudimentary themeing where you can apply an image / texture as a background on the main toolbar. It would be nice if vivaldi could plug into this, then they could have access to that whole library from the get go. If not, simple choosing of icon bg/fg colours would suffice.
@yashpalgoyal1304 It has been a feature for the all versions of Firefox (Android) in the recent past. It works like so: https://support.mozilla.org/en-US/kb/open-links-background-later-viewing-firefox-android
It's a wonderful feature when you're using news aggregators, etc. where you want to read multiple links, and open all those links in tabs without having to continuously switch between the browser and the other app.