Causes out of memory problems Rated 4 out of 5 stars

Worked well initially, but either the introduction of version 1.7 or Firefox 18 started causing endless javascript loop errors - "Error: Component returned failure code: 0x8007000e (NS_ERROR_OUT_OF_MEMORY) [nsIXPCComponents_Utils.evalInSandbox]"Version 1.8 seems not to have solved this.
Looked for help at the developer's website, but that seems just to be a general hosting site and I could find no mention of this add-on.

UPDATE January 13: A so far unpublicised version 1.9 seems to have squashed the script-loop out-of-memory problem. Ads no more slows Google searching a little, but as it's messing with Google code, this is perhaps not surprising. I'll keep it installed to see how life goes on.

This review is for a previous version of the add-on (1.8.1-signed).