Allow installing an ad blocker onto web apps (uBlock Origin Lite, etc.)

Also, wouldn't it be easier to just grab the tab icon of websites (when possible, and if there is none let the user know and they can do it themselves) when creating a web app instead of forcing the user to do it themselves?

The issue mentions web-app creation, ad blockers such as uBlock Origin Lite, and website tab icons, but names no files, tests, or entry points. First clarify whether both requests are in scope, then locate the web-app creation flow and define completion criteria for installing extensions and handling missing icons.

Written by the indexing model from the issue text.