Scroll position in segment list is lost if viewing details of an extension

It is very hard to browse through the extension list and view details of extensions, because after clicking on an extension's icon to see more details about it, and then pressing the back button, the extension list is scrolled to the very top! If I want to continue browsing the extension list I need to find again the extension in the list, which is very tedious. Maybe I do once or twice, but that's it, I then give up.

Extension details could be shown in a some kind of a popup window instead of navigating away from the list page.

No files, tests, or entry points are named in the issue. Start by tracing the extension list and detail navigation in the web app, then verify that returning from an extension detail preserves the prior scroll position so browsing can continue at the same place.

Written by the indexing model from the issue text.