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Document contains no data Alert from Firefox

Sometimes Firefox displays an Alert window which states:

"Document contains no data"

This is usually due to an error in the Firefox settings.

To fix this try:

1. Open Firefox
2. In address bar, type: about:config
3. Press
4. Scroll down and find the setting called "browser.xul.error_pages.enabled"
5. Double click on it to set it to true
6. Now find Browser.cache.check_doc_frequency
7. Double click on it
8. Set the value to 1
9. re-start Firefox to see if the proble is resolved

If you still have problems, also check out ==> CLICK HERE