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Mozilla blocks certain URL's as NOT VALID-why-what criteria-who decides what we can open?

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This is not a computer problem. It is obvious that Mozilla has adopted a policy of restricting certain sites. Please explain why! What is the basis for this policy? Is this not a violation of the first amendment? Please respond. Thank you

This is not a computer problem. It is obvious that Mozilla has adopted a policy of restricting certain sites. Please explain why! What is the basis for this policy? Is this not a violation of the first amendment? Please respond. Thank you

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What websites are you getting blocked? What is the error message you see?

Firefox doesn't block sites unless they are in the phishing and malware protection data database.

Start Firefox in Use Troubleshoot Mode in Firefox to check if one of the extensions or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance/Themes).