Chromium is an open-source browser project that aims to build a safer, faster, and more stable way for all Internet users to experience the web.
Chromium is a subset of Chrome, since Google bolts on other components and features to the former to craft the latter. Google adds proprietary code to Chromium, either its own, like the browser's automated update mechanism, or someone else's, such as Adobe Flash (for now at least), to create Chrome. So, everything in Chromium is in Chrome, but not everything in Chrome is in Chromium.
Chromium can be run at the same time and on the same system as Chrome. There is no need to uninstall Chrome to add Chromium to the machine.
The purpose of Chromium
The purpose of the open-source Chromium project is to provide the source code for Google's Chrome browser, which isn't open source. This allows Google to receive input from outside sources and iterate on new ideas very quickly. In fact, there are several new builds of the Chromium browser released every single day.
In Leapwork, the latest release has provided direct support for both Chromium Edge and Edge browser legacy, where the Start Web Browser block is imbibed with the capabilities to use Chromium Edge simply by selecting the Browser to start property as 'Edge', as shown in the screenshot below:
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