Even back in 2007, I fired up an old Windows ME machine, and found that internet/browsing was completely unusable even back then.
You can try opening the File Explorer, and erase what is at the top of the bar that starts with C:\User...... (or whatever the current folder name is), and replacing it with:
https://www.mozilla.org/en-US/firefox/download/thanks/
It sounds weird, but File Explorer has a jumping off point to the internet. You can even try it on a newer Windows PC to see this in action.
Even when I get older Windows PC's with Win98 to connect to the internet, often Bing is the only page that will load (and not very well at that).
If that fails, try typing one of these combinations into File Explorer:
ftp.mozilla.org/pub/firefox/releases/1.0.1/win32/en-US/
http://ftp.mozilla.org/pub/firefox/releases/1.0.1/win32/en-US/
ftp://ftp.mozilla.org/pub/firefox/releases/1.0.1/win32/en-US/
Firefox 2.0.0.20 is the last version of Firefox to be supported on ME.
Microsoft MCE, CASP+, Linux+, Server+, Cloud+, Certified Forensic Computer Examiner