When comparing CM Browser vs Opera Mini, the Slant community recommends Opera Mini for most people. In the question“What are the best Android web browsers?” Opera Mini is ranked 16th while CM Browser is ranked 35th.
Ranked in these QuestionsQuestion Ranking
Pros
Pro Fast
The browser attempts to preload pages you're about to visit, so when you click on the link to switch to a different page, it's already loaded and ready for you to use.
Pro Built-in popup blocker
The browser prevents sites from distracting you with pop-ups.
Pro Good looking UI
Pro Completely free
Pro Very light weight
Great for phones with lower RAM or performance issues.
Pro Has built-in ad blocker
Pro Has a data saver
Opera mini's data saver has two modes - regular and extreme. great for people with smaller data plans when not on wifi. Has also the ability to control the quality of downloaded images and some video optimizations.
Pro Optimized for Facebook
Cons
Con Fullscreen will auto landscape
Will be troublesome if you want to view it portrait
Con Night mode has issues
as example it cause instagram image and story content gone
Con Doesn't support some common modern browsers functionalities
Some web pages might look a bit broken but from personal experience it doesn't happen often enough (or at all) to be a major issue.
Con Many bugs
In extreme data saving mode, it sometimes won't load page correctly.
Con Has issues while playing video
It will crash when you are playing video.