Fair enough. The browser is built because we think browsers should do a lot more than just tabs and bookmarks, so it wasn't enough to just add an extension (we have many more features that we wanted a well integrated experience around).
With that said, there are very few limitations to the browser at this point and it will be eventually open source so feel free to reach out as well!
If you want to be innovative, have a look at the browser history function. There was zero progress, but I don't see a reason why the history should not allow me to browse all currently cached images.
With that said, there are very few limitations to the browser at this point and it will be eventually open source so feel free to reach out as well!