When comparing Firefox vs Opera Mini, the Slant community recommends Firefox for most people. In the question“What are the best Android web browsers?” Firefox is ranked 1st while Opera Mini is ranked 5th. The most important reason people chose Firefox is:
Firefox is available as a free download. All Mozilla software is licensed under the Mozilla Public License. Instructions on how to obtain the source code can be found [here](https://developer.mozilla.org/en-US/docs/Mozilla/Developer_guide/Source_Code/Downloading_Source_Archives).
Ranked in these QuestionsQuestion Ranking
Pro Free, open source and community driven
Firefox is available as a free download. All Mozilla software is licensed under the Mozilla Public License. Instructions on how to obtain the source code can be found here.
Pro Functionality can be extended with add-ons
By far the best browser if not using an adblocking app like AdAway or Adguard. Adblocking, Privacy, Themes/Stylish, etc. Add-ons make Firefox the best total package mobile browser... You may even forget you're using a mobile browser.
Pro Built-in reading mode
Reading mode allows removing everything on a page but the text. It removes ads, styling and anything else that could get in the way of a comfortable reading experience.
Pro Great efficient and intuitive UI
The scrolling and response is generally faster than Chrome on my Android devices.
Pro HTML5, mobile video support
Firefox for Android supports HTML5, and with support for multiple video formats, you can watch videos right in the browser.
Pro Ethical and pragmatic company mission
The Mozilla Manifesto outlines the company's mission and principles. Paraphrasing, they want the Internet to be a free and open resource, and to enable individuals to get the best use of that resource. They do this by creating open source software to which anyone may contribute, so long as such contributions fit with their principles (both ethical and technical).
Pro Sync with desktop browser
Keep track of all your bookmarks, passwords, open tabs, and history on the go.
Pro Send to device feature
You can send a tab to your mobile or another device, or vice versa.
Pro Built-in ad blocker
Pro Very light weight
Great for phones with lower RAM or performance issues.
Pro Completely free
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
Con Slightly slower
Might be a bit slower than Chromium-based browsers on newer devices.
Con Can't play flash videos
Due to security concerns, Firefox does not include Flash support by default.
Con Reading mode removes some images and videos
Reading mode removes non-textual elements that are not part of the article, but it retains images and videos that are part of the feed node (rss).
Con Many bugs
In extreme data saving mode, it sometimes won't load page correctly.
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.