The latest update to the Edge Dev build brings the Collections feature to the browser. But its not available for use by default. Its still an experimental feature so to use it, you must first enable it through Flags.
In the Edge browser address field, go to: edge://flags/#edge-collections
Once there, turn the feature on by changing it to Enabled…
The browser will need to be restarted for the change to take effect, but once restarted, the Collections icon is now available on the top of the browser and also in Settings.
Collections is an awesome feature, allowing you to collect research data and other things. For example, the following is an example of collecting information on Azure Storage Explorer. As you can see, you can “collect” anything from links, pages, and also page content such as text excerpts.