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Firefox keeps returning the error message "Content Encoding Error". There seems to be no fix to this problems. Help or I will stop using Firefox.

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New User

Firefox keeps returning the error message "Content Encoding Error". There seems to be no fix to this problems. Help or I will stop using Firefox.

"Content Encoding Error". This error is getting on my nerves. I've installed and reinstalled Firefox many times thinking that the error message would go away. No way! The error message comes up almost all the time. My IE works fine. What gives? If the Firefox team doesn't put its' resources to work and comes up with a working solution, many customers will abandon Firefox. Firefox Tech/Support do your job!

16 REPLIES
Site Moderator

Re: Firefox keeps returning the error message "Content Encoding Error". There seems to be no fix to this problems. Help or I will stop using Firefox.

You can check the network.http.* prefs on the about:config page and reset all bold user set network.http prefs to the default value via the right-click context menu -> Reset.

Check at least:

New User

Re: Firefox keeps returning the error message "Content Encoding Error". There seems to be no fix to this problems. Help or I will stop using Firefox.

I faced this problem when I developed multi-platform apps for smartphone users.

New User

Re: Firefox keeps returning the error message "Content Encoding Error". There seems to be no fix to this problems. Help or I will stop using Firefox.

I cannot get passed the error message "Content Encoding Error". This is a serious problem with Firefox and priority should be made to solve this frustrating error. I'm at a point where I have to abandon Firefox. I can't deal with it anymore.

New User

Re: Firefox keeps returning the error message "Content Encoding Error". There seems to be no fix to this problems. Help or I will stop using Firefox.

Firefox tech support "SHAME ON YOU FOR NOT DOING YOUR JOB".

Site Moderator

Re: Firefox keeps returning the error message "Content Encoding Error". There seems to be no fix to this problems. Help or I will stop using Firefox.

Do you have a link to a page that gives the "Content Encoding Error"?

Did you try to clear the cache and cookies and maybe reset prefs?


Create a new profile as a test to check if your current profile is causing the problems.

See "Basic Troubleshooting: Make a new profile":

There may be extensions and plugins installed by default in a new profile, so check that in "Tools > Add-ons > Extensions & Plugins" in case there are still problems.

If the new profile works then you can transfer some files from the old profile to that new profile, but be careful not to copy corrupted files.

See:

New User

Re: Firefox keeps returning the error message "Content Encoding Error". There seems to be no fix to this problems. Help or I will stop using Firefox.

I share your pain people! I am thinking the issue is somehow related to the current build. For now though if you are a firefox junkie like me, try the following:

1. In the address bar--you know where "www.google.com" normally goes in--type-in about:config

2. Accept the prompt and search for "encoding" and double-click on the "network.http.accept-encoding"

3. In the pop-up window from step 2, remove "gzip, deflate" and replace it with "true" without quotations.

Happy browsing!

(please do not propose to change this pref to an invalid true value as this can cause serious issues, so leave it to the default) - c

New User

Re: Firefox keeps returning the error message "Content Encoding Error". There seems to be no fix to this problems. Help or I will stop using Firefox.

Thanks for the warning. I did find that while changing the setting to "true" works at times, it does present an issue later on other websites. I have been going back and forth with the changes with enough frustration and decided to wait for version 17 which I tried a few moments ago still to no avail.

I have also tried resetting my profile as suggested by few here and still no luck. Right now I am using IE or Chrome for normal browsing which is quiet painful as I have missed my Firefox plugins and customization.

It would be much appreciated if someone can help explain what me and others here are missing.

I should add that my system at work with Windows 7 doesn't seem to be experiencing the problem at all. However my Windows 8 platform is still plagued with it.

Regards, Prince

Site Moderator

Re: Firefox keeps returning the error message "Content Encoding Error". There seems to be no fix to this problems. Help or I will stop using Firefox.

Firefox should be working properly with the default value of the network.http.accept-encoding pref. I've only see a few times problem reported when it was necessary to disable gzip and only leave deflate enabled because a server did use an unsupported gzip method and needed to be updated.

Which security software (firewall, anti-virus) do you have?

Some firewalls can modify the response headers or inspect the content of packets and corrupt the data while doing this, so Firefox gets raw data and doesn't know that it is compressed and thus shows garbage (gibberish).

Try to boot the computer in Windows Safe mode with network support (press F8 on the boot screen) as a test to see if that helps (this should switch to the Windows firewall).

New User

Re: Firefox keeps returning the error message "Content Encoding Error". There seems to be no fix to this problems. Help or I will stop using Firefox.

Did everything to no avail. Even scrubbed Firefox entries in the Windows registry after removing Firefox and subsequent re-installation never worked.

It may be possible that i installed some software that caused the problem. But it is even frustrating that even though the issue only affected Firefox, no one had any specific way to address the issue.

I had scrub my Windows 8 entirely and reinstalled--it is working for now.