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I use this bookmarklet in order to upload images from the web into imgur:
javascript:void(window.location="http://api.imgur.com/2/upload.json?url="+encodeURIComponent(window.location.href));

Add a new bookmark using that code as the address and choose a nickname like "imgur".

The next time you see an image you want to transfer to your imgur gallery, just open it and type the nickname on the address bar. Alternatively, you can use it as a button but I'm more into clean, buttonless layouts.

Source: http://www.reddit.com/r/operabrowser/comments/r4uq5/dae_get_stuck_in_this_loading_screen_when/c437pwq