Get message thattThe page you are trying to view cannot be shown because it uses an invalid or unsupported form of compression.
Message I get is labeled "Content Encoding Error". I get this error frequently (in last 3-4 weeks only) when I do a Google search and click on a link. These are common sites I have been able to view in the past.
Attached is screen shot of message that I get.
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You can check the network.http.accept-encoding pref on the about:config page.
You can reset user set (bold) pref(s) on the about:config page via the right-click context menu to the default value.
You can open the about:config page via the location/address bar. You can accept the warning and click "I'll be careful" to continue.
I was able to get to the "about:config page" and the "I'll be careful", but then the choices of what to do next were beyond my technical expertise.
Are you able to locate the network.http.accept-encoding pref on that page?
What is the current value of the pref?
Can you attach a screenshot?
- https://en.wikipedia.org/wiki/Screenshot
- https://support.mozilla.org/kb/how-do-i-create-screenshot-my-problem
- Use a compressed image type like PNG or JPG to save the screenshot
- Make sure that you do not exceed the maximum size of 1 MB
Attached is the screen shot of value for "network.http.accept-encoding pref"
That looks OK.
Start Firefox in Safe Mode to check if one of the extensions ("3-bar" menu button or Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem.
- Switch to the DEFAULT theme: "3-bar" menu button or Tools > Add-ons > Appearance
- Do NOT click the "Refresh Firefox" button on the Safe Mode start window
- https://support.mozilla.org/kb/Safe+Mode
- https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes
Do you have security software that could possibly modify the HTTP request headers?
You can check the HTTP request headers via a website like this;