DuckDuckGo vs Opera

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".

DuckDuckGo results page is an infinite scrolling page, so you don't need to be clicking through pages.

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.

The search engine allows freely disabling ads.

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.

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.

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.

Duckduckgo lets you watch videos right from their site, so you can have more privacy than watching on youtube.com.

Only accessible from Tor.

Sometimes the search results are better. Most of the times, they're at least as good as.

For example, if you search "Color Picker" , you see a color picker.

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.

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

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.

This is the biggest private search engine there is

You can go to the Wikipedia page for pigs by doing !w pig.

The built-In adblocker is faster than any extension. It's possible to add your own filter lists. However, the adblocker isn't enabled by default.

Free VPN onboard (but it's slow and it leaks your IP), includes Germany, Canada, USA, Netherlands, Singapore.

You can pop-out any video and it will stay on top while you are surfing on other tabs.

Since Opera is built on Blink, the same engine Chromium is built on, it was possible for Opera developers to allow Chrome extensions to run in their browser.

Opera scores highly on HTML5 feature support.

Opera has a functionality called Turbo which increases browsers speed and reduces data consumption considerably by compressing the data that's found in a web page.

Unlike other browsers, you can install add-ons such as tabs, bookmarks, history, sessions, notes, and extension manager in the sidebar. So you have the flexibility to use it for your purpose.

Opera Sync allows you to synchronize your bookmarks, passwords, and more from any computer, phone, or tablet.

Opera is full of user controlled settings. Everything can be imported and exported even RSS feeds. It can be skinned in a variety of different themes or it can be extended through the use of a large number of plugins available.

Opera supports cross-browser extensions. Opera Addons site keeps quality up compared to Chrome Store. Full of useful extensions, Opera also supports extra APIs like Speed Dial API, Extension Sidebar API and Stash API meaning wider variety of extension possibilities than in Chrome.

Opera's Speed Dial (new tab page) has the ability to hold as many websites as you want, and you can customize it almost however you want. You can also organize the websites on the Speed Dial into folders.

Source code available on GitHub.

Scores top on Basemark.

You can save the Opera's setup files on a USB hard drive and run its portable version anywhere.

Opera got Reborn UI as the first implementation from Opera Neon concept browser. Snap -feature is next. Opera constantly improves its basic functionality - unlike Chrome.

Without any cost unlimited and working.

It doesn't consume much RAM, unlike Chrome.

Just highlight price on a website and see this price in your currency.

Opera loads videos faster, making it useful for slow internet connections.