if you highlight the mediafire link in your browser and right click, there should be an option to the effect of "open in new tab" or "go to (link of text here)" in a modern browser. Use this option, then when you open the page you'll see a big blue button, that is the download button. You can click this and deal with popups or you can drag this from the browser window into your jDownloader2 application which you should have installed if you download with any regularity.