Chromium vs Firefox Developer Edition

Chrome and Chromium are available on almost every device nowadays

This is the browser Blink is made for and developed alongside.

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

Both Chromium and and its rendering engine Blink are licensed under the BSD-license which includes no copyleft unlike the GNU or Mozilla Licenses.

Chromium can access the Chrome Web Store and all the extensions hosted there can be installed and used on Chromium.

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.

It does not have any extensions preinstalled and focuses to be a web browser.

You can do almost anything with the code.

While the Chromium-based browser haev to adapt their code to the update before release, original Chromuim doesn't need it so it gets updated more constantly and frequently.

Since Google Chrome is the most used web browser, and that browser along with many others is based on Chromium, Chromium sets the standards for the internet and for security, and Firefox will always be years behind.

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.

Unlike Chrome it does come wihout any Google account requirement.

Is the only browser I know with features specifically oriented to aid web development out of the box.

Some might find that useless, but that's very practical to dedicate a browser to development.

AFAIK, Firefox is the most HTML/CSS/JS standard complaint of all the browsers out there.

This browser is the most feature richt browser for web development out of the box.
You can restrict the bandwidth in "Responsive Design Mode" to see how the page performs under unoptimal conditions.
It has predefined profiles for e.g. Ipad, Galaxy S9 and lots more.

It's Firefox. It's fast.

As this branch of firefox uses a beta channel of firefox releases, you will see if future versions will contain breaking changes and give you time to react.