Chrome: If you’re annoyed by animated GIFs or just want to pause them to catch a certain frame, Paused! is an open-source Chrome extension that freeze frames GIFs with a single click.
Install the extension, reload Chrome, and from then on any animated GIF you come across can be halted with a simple click. Click once to freeze, click again to unfreeze. It’s a one trick pony but if the ride you want is to Frozen GIFville you’re in luck.
Paused! is an open-source extension, Chrome only.
Paused! [Chrome Web Store]