When comparing DuckDuckGo vs FOSS Browser, the Slant community recommends DuckDuckGo for most people. In the question“What are the best Android web browsers?” DuckDuckGo is ranked 15th while FOSS Browser is ranked 20th. The most important reason people chose DuckDuckGo is:
DuckDuckGo does not collect or share any personal information. Their [privacy page][1] has a great rundown on why privacy is important. The most important repercussion of this is that DDG doesn't use the data collected to tailor results, avoiding exposure to the "[Filter Bubble][2]". [1]: https://duckduckgo.com/privacy [2]: http://en.wikipedia.org/wiki/Filter_bubble
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Very protective of user privacy
DuckDuckGo does not collect or share any personal information. Their privacy page has a great rundown on why privacy is important. The most important repercussion of this is that DDG doesn't use the data collected to tailor results, avoiding exposure to the "Filter Bubble".
Pro Infinite scroll of search results
DuckDuckGo results page is an infinite scrolling page, so you don't need to be clicking through pages.
Pro Ads are non-obstructive and don't track you
The ads are clearly labelled as ads and are non-obstructive. The ads are based on the searched keywords and there's no tracking involved on their visibility. You just need to remember that the site the ad links to might track you.
Pro Can disable advertisements
The search engine allows freely disabling ads.
Pro Allows searching from specific sites using bangs
Bangs are commands that allow searching via a different website's local search engine, using keywords or abbreviations with an exclamation mark (!). For example searching "world war ii !wiki" will automatically redirect to Wikipedia.org and show results for the query "world war ii" there, instead of DuckDuckGo, using Wikipedia's search engine.
The more common sites have shortened alternatives for these commands. Such as !g for Google, !i for images and !yt Youtube.
The whole list of bangs can be found by typing "!bang" in DuckDuckGo.
Pro Has a wide spectrum of instant answers
For select queries DDG pops up a box that supplies the exact answer. For example, searching "stopwatch" will pop up a stopwatch, asking for "words like..." will show a list of related words, typing "password" will generate a password, etc.
Pro Many customization options for appearance
DDG allows customizing almost any aspect of the search engine's appearance including fonts, page width, alignment, header behavior, site icons, etc and has a selection of premade themes available as well.
Pro Lets you watch YouTube videos from the site
Duckduckgo lets you watch videos right from their site, so you can have more privacy than watching on youtube.com.
Pro Has a .onion site
Only accessible from Tor.

Pro Sometimes results are better than Google
Sometimes the search results are better. Most of the times, they're at least as good as.
Pro Has many fun features
For example, if you search "Color Picker" , you see a color picker.
Pro Can function without JavaScript
Of course, it's nicer when enabled, but it's not required. Some browsers are too limited (mobile, terminal) or turn it off for security reasons (tor, etc.), and DDG still works.
Pro Good for Linux users
DuckDuckGo has an API with some websites. With the help of this API, if you search for a fix of a problem in Linux, you can easily find an answer to the problem. For example, if you search for "How to update linux", you will get a message like this:
How to install updates via command line
Try this:
sudo apt-get update # Fetches the list of available updates
sudo apt-get upgrade # Strictly upgrades the current packages
sudo apt-get dist-upgrade # Installs updates (new ones)
--SirCharlo
Pro No filter bubble
DuckDuckGo does not filter your search’s with the data that they have. You get to see everything the Internet has to offer in a safe, private way.
Pro It's mainstream
This is the biggest private search engine there is
Pro Lets you go to other sites
You can go to the Wikipedia page for pigs by doing !w pig.
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 No date information in search results
In search results, there are no dates when the pages were published, which doesn't allow you to immediately know if the page is outdated.
Con Downranks misinformation results
Company announced that they are downranking misinformation results about the war by Russia media, after Russian's invasion of Ukraine.
Con Irrelevant search results
They store no information about you (theoretically a pro) but this results in absolutely awful search results, and having to modify your search terms 4-5 times to get what you are looking for.
Con Owner would compromise his service/customer privacy
In a question to Weinberg, “if you were served an NSL or were commanded to compromise your service/customer privacy in any way, would you and could you just pull the plug like Lavabit did or would you run into opposition from shareholders/investors that would prevent you from doing so?” Gabriel Weinberg said: “No one is preventing me from doing that.”

Con Still not better than Google
Results are quite often not as good. They just lack resources to do it, for now.
Con Based in US, so they cannot guarantee there is no backdoor
Con DuckDuckGo has no 3rd party certifications
Con Activism censorship
They started to block results based on activism.
Con Search using language other than English is not so great
Korean would never use it.
Con Referrers
A referrer is an HTTP header field that identifies the address of the webpage (i.e. the URI or IRI) that linked to the resource being requested. By checking the referrer, the new webpage can see where the request originated.” Basically it tells a website where you came from. DDG does give this out.
Con Bing = DuckDuckGo
Duckduckgo depends on Bing for the query.
Con Search results are often unrelated and limited
Common conversions do not work, i.e. searching for 15F to C does not give you the conversion but just a bunch of conversion websites. Very frustrating. It's a simple thing but makes a huge difference to the browsing/searching experience. Also location based only works for the country you're in. Searching for, say, McDonalds only gives country results for McDonalds and no local results such as where a local restaurant may be. Not very helpful.
Con DuckDuckGo has many 'Owners'
DuckDuckGo is owned by Gabriel Weinberg who is is the founder, current CEO and controlling shareholder. Investors/shareholders include Union Square Ventures and several others. DuckDuckGo generates its income from advertising (Bing Ads) and collects affiliate revenue (Amazon, eBay).

Con Needs a clearer vision of the future
What's duck's goal or quest?
Con Shows too few images
When searching for images only, it shows too few of them and only a handful are related to the search terms.
Con Hosted on Amazon servers (EC2)
Con Bangs do not protect user privacy and can be misleading
Using these bangs will instantly connect you to the service you requested. For example typing “!g white cat with green eyes” and hitting return, drops you off on the Google website to display your results (thus logging your IP, search term and browser info immediately). It does not get you Google results inside DuckDuckGo. It is reasonable for DDG users to assume and expect a private search engine warns if there is a risk to that privacy being lost, like it does with Youtube videos but in the case of Bangs this does not happen.
Con Saving settings in Duckduckgo's Cloud still needs improvement
Cloud save and the ability to pull up your settings on any device is a nice idea but the implementation needs work.
Con Doesn't do personalized searches
Since they don't track you the results are not tailored to your interests.
Con Form over function (overall search experience is poor)
It's nice to adjust the settings and all but after a couple of days you will want to go back to a more functional search engine.
Sure DDG looks shiny and !bangs are great but many wouldn't consider it as a viable alternative. Better results for search queries is more important than fancy looking CSS.
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.
