In Stack Exchange, I insert images to posts like this:
1. If the image is already saved in my computer: I just upload it normally.
2. If the image is a screenshot or an online image: I copy the image to clipboard and paste (Ctrl + V in Windows) to the post.
In TopAnswers, (1) is already available. However (2) is missing. So I have to save images, even my screenshots, to a file named `auxiliary.png` in my pictures folder, and then upload the file. It is very time-consuming compared to the way I did in SE. Sometimes my computer goes laggy, it increased the time wasted even more.
I don't know whether older browsers (IE, ...) support such a feature, but I hope the feature will be implemented soon :).
Update Dec 2020: Expanded to work in posts as well as chat. This is currently a bit rough and ready: there is no error handling, and it's only tested in FF.
Update Mar 2020: This is now working (though only tested in FF and Chrome).
Update Feb 2020: I've moved this on to [to a GitHub issue](https://github.com/topanswers/topanswers/issues/15) so work can begin, and will update the post here when it is complete.
Someone also mentioned this in chat (can't find it now), so it is already on the todo list.
If this is possible (and from what I understand of [this post on SO](https://stackoverflow.com/a/7784202) it seems like it is for 'modern browsers'), it would be very nice to have at minimal cost.