Content Encoding Error Message re invalid or unsupported form of compression

Question

After installing the last update, when I would attempt to go to various websites, even google, I would get this message on some sites not all. I did not get on IE or chrome.
"Content Encoding Error
The page you are trying to view cannot be shown because it uses an invalid or unsupported form of compression.'
This is what I did.
Open Firefox
1) in the address bar, type: about config 2) promise to be careful 3) type in the filter bar: encoding 4) double click on the value column of network.http.accept-encoding 5) change the 'string value' from "gzip, deflate" to "true" (I had to type that in.) I found that on another string that was closed that the moderator said not to do it or it could mess things up.
I do not know if issue was caused by last update as add or remove programs in control panel does not show Mozilla updates so I could not uninstall last udate. Only other thing I had done was reinstall Real Player Plus with Real downloader and Speed-bit accelerator as I was having trouble downloading flash videos from web pages mainly from Firefox. (Chrome in its wisdom playing god disabled the addon without even asking me so I could not use Chrome for downloads-they said something about not knowing publisher or certificate--"Real Networks"!!! maybe Google-Chrome does not want users of "You Tube which I think it owns to be able to download offf it with competitor or sort of competitor's applications.) I do not know that the Rel Player re-installation had anything to do with the Firefox error message-just contemporaneous in time as was the Firefox update that I only knew about as Firefox let me know I had to restart to finish installation of update.
After ten minutes after making changes re config it seems to be operating OK

Answer 1

After leaving my computer on all night with Chrome and Firefox both open but doing no downloading, etc., I noticed that Wincows Task Manager icon was all green showing 100% CPU usage. I opened Internet Explorer 8 which had been off all night. I looked at Windows Task Manager "processes". It shows firefox.exe with cpu at 86 to 95, iexplore.exe two instances, both at at 00-02, and chrome.exe (2 instances) both at 00. Realpaly.exe also left on all night after burning multiple Cds 6 hours earlier was also at zero. Nothing named speed bit had an active process, but videoacellerator.exe and VideoacceleratorService.exe both of which I allowed to stay in a startup folder were both at 00. Firefox is not downloading videos etc. It has two windows open, one at eBay and one support.mozilla on this issue(content encoding error). This all started occcurring after the latest Firefox update that necessitated the restarting of my computer. I have th two Firefox extensions that like T=Real Downloader allow downloads of flash videos on web pages and neither one was active Flash and Video Download, and Flash Video Downloader the former had been active for several continuous days downloading multiple video clips but had been turned off before I went to bed. After an hour typing this things are still the same with Firefox the CPU hog , still at 84-97, chrome.exe and iexplore.exe still both under 05. For some reason with the recent update tht required restarting the computer Firefox has become a CPU hog and is not working properly withprograms (Windows downloader and Speedbit) and has the content encoding error message issue as wll as sometimes IE not able to go to some pages. My CPU icon in taskbar is teill all green, and can't close firefox without a lot of hassle as that is what I am typing this on.., but I bet that when I do total CPU usage goes to 20 or so and system idle process is the only process with numbers over 80 for CPU.
Has anyone told a webpage manager that there is an encryption problem with their webpage (such as Google or Amazon) as the error message instructs us to do?