why don't you give an uninstall and reinstall a try?

I've tried it. I think it is a problem with Hughes Sat. Web Accelerator but they claim it's not their problem. I was told they don't claim to support Firefox. Told me to run on IE or Chrome instead. I have been a Firefox user for years and I love it. On the Hughes blogs I saw quit a few people with the same problem but no solutions. Hoping Firefox will address the problem and find a solution on their end.

I have the same problem. I am able to surf the internet fine. Just when I attempt to download from any web site do I get error. It seems to be computer related, not Hughesnet related because I don't get the error when I plug Hughesnet into my laptop.

Does it work if you disable that web accelerator and use a normal connection?

See "Firefox connection settings":

• https://support.mozilla.com/kb/Firefox+cannot+load+websites+but+other+programs+can

I started seeing this error 2 weeks ago on my desktop connected to Hughesnet at my farm, which formerly worked just fine. I only saw the error when downloading. I was able to surf the web. Although Hughesnet is sending me a new modem after spending too much time talking to India... I found that I did not have the same problem using my laptop at the same site. On comparing network setting, the only thing I found different between Laptop and desktop is that on my desktop, the LAN setting in my network setup had a check next to "use a proxy server..." I unchecked it and am now fully operational! Phew! Hope it works for others.

Thank you snakeknuckles !!!!! It worked. I called Hughesnet today and got less than no help and then was transferred to a tech support group "partnering" with Hughesnet called ITOK. The ITOK technical support guy said he could help me but first I needed to pay the $100.00 fee for their service and I believe an additional $10.00 / month. Thankfully I declined and decided to dig deeper for a solution myself. Bravo - snakeknuckles !!!!!

Snakeknuckles, well done! I have been having this problem for months and add to my frustration having to deal with HughesNet. When I first unchecked the box, I tried watching a video and it didn't work. It only worked after I restarted my computer. Adding this step might save just a little bit of frustration. The only thing I can't understand is that I did not change any of my LAN settings prior to the problem starting. Oh well. Thanks again.

It works!!! Thank you for this advice . I no longer get the 508.2 dns error after removing the check in the (allow proxy server box) in the LAN properties screen.