Rated 5 out of 5 stars
Thank god it still works on FX20. Just realized how bad I need something that tells me how big a file is before I start download. Found this with notice that it is no longer being developed. First time I've ever seen the "+ (obsolete)" notification for an add-on ever. Not. Works fine. I tested it on some links at archive.org
and it's fine. Sometimes I have to click on the 'get file size button' but then it shows me what I need to know!!! Hooray for the developer wherever he is...