When comparing Dolphin vs FOSS Browser, the Slant community recommends Dolphin for most people. In the question“What are the best Android web browsers?” Dolphin is ranked 17th while FOSS Browser is ranked 19th. The most important reason people chose Dolphin is:
As with any KDE app, Dolphin, allows adding or modifying toolbar buttons and keyboard shortcuts.
Ranked in these QuestionsQuestion Ranking
Pros
Pro Immenseley configurable
As with any KDE app, Dolphin, allows adding or modifying toolbar buttons and keyboard shortcuts.
Pro Can split views
Dolphin supports splitting the view in two navigational areas, this way you can navigate two different directories at the same time.
Pro Integrated terminal
Pressing F4 with any opened folder on a mounted path opens a console within dolphin.
Pro Also has a refresh option
Dolphin is without a doubt the best fully functional and easy to use and multitask with.
Dolphin also has a refresh button which no other File manager has. It's great for tracking a large files transfer; that's what file managers are for - good common sense.
Pro Easy to extend with plugins
Dolphin follows KDE's philosophy of being extendable and configurable. It can easily be configured and customized through plugins.
Pro Auto mounts flash drives
Dolphin automatically identifies and mounts external flash drives.
Pro Fast at opening graphics folders
Pictures with or without previews is optional and selectable at the touch of a button.
Pro Does not use third party libraries
Unlike all those GTK-based file managers it does not have to rely on external written software for its functionality because KF5 is KDE SOftware and developed alongside.
Pro Keeps its state
It starts with last opened folders.

Pro Fully supports HiDPI
Supports HiDPI displays.
Pro Automatically centers items
In icons view mode, the space between files gets stretched so that there is never and annoying empty space at the right side of the window.
Pro FOSS
The name itself suggest FOSS (Free Open Source Software).
Pro Respects your privacy better than all other Chromium based browsers
Requires more flexibility if possible.
Pro No trackers
Recent version of app.
Pro Excellent flexible app user data management
Complete user's custom browser settings, database (site settings such as whitelisting, etc.) and bookmarks can be exported (as a backup) and then imported (to be restored for later use).
Important Note:
Before uninstalling and reinstalling the browser app, create an archive or a copy of the already backed-up data of it to another location of data storage.
Pro UI/Handling
Optimized for one hand handling (toolbar at bottom).
Pro Multi tab browsing
Tab control (switch, open, close unlimited tabs) mentioned by developer, supported (limit to device available memory).
Pro Websearch (from marked text context menu)
Pro Search on site
Pro Advanced gesture control for toolbar and navigation button
Pro Fast toggle for most important settings
Pro Navigation button in fullscreen mode
Pro Do not track me
Mentioned by developer.
Pro Delete data on exit (optional)
Mentioned by developer.
Pro Toggle image/third party content loading
Mentioned by developer.
Pro Whitelist from setting
Whitelist for javascript, cookies and adblocker.
Pro Third party cookies disabled by default
Mentioned by developer.
Pro Custom user agent switcher
Supported & adaptive (most flexible).
Pro Save web page as PDF (URL to PDF)
Supported (but check complexity of web page).
Pro App optimization
Installation size under 10 to 20 MB (depends upon OEM manufacturer & data usage by user).
Pro Adblock filters
Supported.
Pro Excellent Bookmarks Management
Import & Export Bookmarks, very few browsers have this rare functionality.
Cons
Con May be a little slow on startup
Dolphin can be a little slow on startup (depending on distro, hardware etc...). Startup time can vary from a couple of seconds to up to a minute.
Con Can hang on remote file systems
It doesn't cope well with remote file system nicely like sshfs or any samba, like when network is not responding/very slow. It just hangs.
Con "Type" column too verbose
Despite having a large enough monitor, if you keep the size of the browser window small, the "Type" column (in "Details" view mode) insists on including the complete multipart MIME string, making the column so wide that trying to limit its width makes the column useless. Sorting by "Type" renders the list into an incomprehensible mess.
Con Poor optimization on later versions
Con Too simple
Feels weird on KDE because it has less customizing options Konqueror and any other KDE app have.
Con Can't perform ROOT actions
Developers set a constraint in Dolphin that deny Dolphin to run with root permissions. Hence, if you want to perform an action that require root permissions, such as rename a file in /etc/ folder, you are forced to use terminal or switch to another file manager.
Con Android permission location
Today, most browser developers put 2 location permissions: 1) Precise & 2) Approximate, most people search goods & services "by typing name of specific region or place".
i.e: books library in "name of city"
So, is there any need to such permissions which is a privacy concern ?
Con Github users may track you
Con Backed by Github.com
Github is known for making it open source, and hosting tech pros, open source user, and others. This was made to be better then Chrome.
