Effective but with a bug Rated 4 out of 5 stars

Edit: after contacting the dev, within a day he fixed the problem for me. It still isn't perfect when activated, but when deactivated, it won't run the background process that caused the problem. And that's good enough for me. Great support!

Scc is a great extension that has helped me with converting prizes on sites as eBay and Amazon.One bug keeps persisting though. When visiting the google image search site, firefox begins to run very slow and hangs intermittently. This only happens with scc installed. Whether the extension is enabled or disabled doesn't matter; the problem keeps persisting until the extension is removed. After that the problem is over.

This review is for a previous version of the add-on (1.0.13.1-signed.1-signed). 

Please try version 2.0.4.
Have totally rewrote it