When comparing Chromium vs Evince, the Slant community recommends Evince for most people. In the question“What are the best PDF viewers for Linux?” Evince is ranked 4th while Chromium is ranked 11th.
Ranked in these QuestionsQuestion Ranking
Pro Completely Open Source
Both Chromium and and its rendering engine Blink are licensed under the BSD-license which includes no copyleft unlike the GNU or Mozilla Licenses.
Pro Supports all of Google Chrome features
As Chrome is based on Chromium they overlap in supported features. Chromium syncs between devices, automatically updates, has great built-in developer tools, installs extensions without a restart, includes a combined text bar for entering URLs and searching and has excellent HTML5 compatibility just like Chrome.
Pro Access to Chrome's extensions
Chromium can access the Chrome Web Store and all the extensions hosted there can be installed and used on Chromium.
Every tab and plugin runs in its own subprocess so they will never affect the whole browser ,however that consumes more memory than other browsers
Chrome and Chromium are available on almost every device nowadays
Pro Latest Blink
This is the browser Blink is made for and developed alongside.
Pro Does not come with Google
Unlike Chrome it does come wihout any Google account requirement.
It does not have any extensions preinstalled and focuses to be a web browser.
Pro Backed by Google
Chromium was first released as a large portion of Chrome's source code as an open source project by Google in september 2008. The idea was to encourage developers to review the underlying code and to contribute in making Chrome cross platform and port it to Mac and Linux as well.
Nowadays Chromium is a large project with a huge community that's standing behind it but still Google continues to take an extremely active role in Chromium development. This ensures the longevity and constant development and improvement of the browser.
Pro BSD license
You can do almost anything with the code.
Pro Free and open source software
Pro Can annotate a pdf
It isn't immediately obvious how to do this, but the instructions are here.
As of 13 June 2018, the icons/screenshots on that page look different than what can be seen under Evince v3.18.2, but the devs have been alerted to this discrepancy, and there are requests they make the finding/using of annotations more intuitive than they are now.
Pro Can find a word in a pdf
Pro Supports touchpad gestures
Pro Good integration with Gnome desktop
Pro Supports touch interaction
Supports touch, including drag and pinch to zoom.
Pro Can play embedded video
To my knowlegde, the only PDF reader on Linux that can play embeded video (unfortunately not in presentation mode, which is a major drawdack).
Pro Search results list
Click/tap the magnifying class in the top bar.
Con High RAM usage
Due the sandboxing, Chromium also eats a lot of RAM , which can be a problem for machines with smaller RAM.
Con Lacks privacy options
Con No official builds
There are no official builds available so you have to rely on a third party distributor
Con Can be dangerous / only available as Source
There are plenty of unofficial Chromium distributors and every one of them can disable specific features (like sandboxing) for their build, so you will never know what you get.
Con Not possible to disable WebRTC
Con Lacks support for certain common media formats
As Chromium avoids bundling any proprietary software, media that requires proprietary codecs or formats such as AAC, H.264, MP3 and Flash will not play by default on Chromium.
Con Fat, slow, and another piece of google spyware
Con Under BSD License
Con Can be dangerous
Because it's completely open source, people can make a fake version and install it when you install other software. And people can add a virus in it.
Con Scrolling is not smooth
Con Window can't be resized
You can only read in a small box or fullscreen, no way to manually size window.
Con Tied to GNOME
Comes with all those weird things like popovers and clientside windows.
Con Keyboard shortcuts cannot be rebound
Con Thumbs not working
Scroll once, and all thumbs in the side panel are gone.
Con Poor UI
Since version 3 it is almost unusable.
Con Unicode Problems
Some languages other than English do not render correctly
Con Adding annotations isn't as intuitive as it should be
Instructions can be found here. Specifically, a user should be able to select a word or block of text, then right-click and see highlight/add note options in the drop-down menu. Currently, this option isn't available (as of Evince v3.18.2 / 13th June 2018).