This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

Content encoding error comes up no matter what site I try

  • 1 reply
  • 8 have this problem
  • 1 view
  • Last reply by zzxc

AnonymousUser
AnonymousUser
more options

Error message: The page you are trying to view cannot be shown because it uses an invalid or unsupported form of compression.

This happened

Every time Firefox opened

it started a week or so ago, can't think of a reason why

User Agent

Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US) AppleWebKit/532.5 (KHTML, like Gecko) Chrome/4.1.249.1045 Safari/532.5

Error message: The page you are trying to view cannot be shown because it uses an invalid or unsupported form of compression. == This happened == Every time Firefox opened == it started a week or so ago, can't think of a reason why == == User Agent == Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US) AppleWebKit/532.5 (KHTML, like Gecko) Chrome/4.1.249.1045 Safari/532.5

All Replies (1)

zzxc
zzxc
more options

Does this happen on secure sites? Try https://support.mozilla.com - the secure version of this support site.

The most common reason for all sites being blocked is a firewall, so try the steps at Configure firewalls so that Firefox can access the Internet and let me know if the problem still happens.