Chat window size. I don't like that you can't expand the sidebar to full screen or to be bigger while in chat. It only expands to less than half the screen and only a bit more than half of that is chat area. It's ok for a quick question as long as the answer is short otherwise there is way to much scrolling.

OK, but unsophisticated. 1) there are no labels for searches so you have to rely on the icon, which is very small. 2) if you do not provide and icon when you add a new search it will not be saved. Most such extensions are able to extract icons from sites like Amazon. 3) You can't change the size of the bar or it's placement. It always shows under the default Opera Search/Copy pop up. Annoying.
Otherwise, it functions very well.

search engines do not show up in pop up. any at all, only "search,copy,flow"