I recently made the switch from Google Chrome to Opera on my iMac (21.5-inch, Mid 2011), so far it has been great however I've noticed that it's very slow to actually save an image. When I right click an image and go to "save image as" it then takes a good few seconds to load the browser window to select a destination (around 13 seconds), once I click save it also takes quite a while before it actually saves the image (2-3 seconds). At first I assumed this was happening after launching it for the first time since the computer was last awake but it does this for every single image, even after a long time of the browser being opened.

I'm fairly certain it isn't a hardware issue as saving images via Google Chrome and Safari is almost instant. I've tried a fresh install of Opera, without any extensions running and the problem still exists.