Review for NWS METAR+TAF by virga7
Rated 5 out of 5 stars
Wonderful! Really practical!
For some reason I wasn't able to install it from here. It keeps saying this search engine is not supported by Firefox. I had to download the xml and put it in the 'searchplugins' folder. I'm using FF 3.6.13.
To create your own collections, you must have a Mozilla Add-ons account.