Works fine on a mac in Safari. There is no reason why it shouldn't work in any browser on any platform as it just uses the address of the picture (not the page it's on, but the picture itself) surround by BBcode image tags. In Safari you can get the address of the picture by right clicking on it, and then selecting "Open image in a new tab". Go to that tab and select the url from the address bar.
Works fine on a mac in Safari. There is no reason why it shouldn't work in any browser on any platform as it just uses the address of the picture (not the page it's on, but the picture itself) surround by BBcode image tags. In Safari you can get the address of the picture by right clicking on it, and then selecting "Open image in a new tab". Go to that tab and select the url from the address bar.