This is for Firefox v2+, Tutorial by xWhite_Shadowx
1.) First go ahead and open firefox
2.) In the address bar type in "about:config"
3.) It will say to be careful, just click "I'll be careful" to go in
4.) You'll notice a bunch of files and a search bar at the toplabled "Filter"
5.) Type in the Filter search box "firefox" without the quotes
6.) The last result on the bottom should be "general.useragent.extra.firefox"
7.) Double click it and it will show text you can edit
8.) Edit the text you see to "MEGAUPLOAD v1.0" exactly like that, with no quotes
Now you have it, of course you still use the Regular Download button, however there will no longer be download restrictions, download limits, or wait times to download one file after another. The only thing I'm unsure of is files over 1 gigabyte.