Recent answers to Cannot access a particular websitehttps://support.mozilla.org/ar/questions/13846612022-07-31T08:07:06-07:00"You don't have permission to access..." errors are characteristic of a firewall that protects the s2022-07-31T08:07:06-07:00cor-elhttps://support.mozilla.org/ar/questions/1384661#answer-1523912<p>"You don't have permission to access..." errors are characteristic of a firewall that protects the server against misuse and this firewall thinks something is suspicious about the HTTP request.
If you use a proxy or VPN then try to use a direct connection.
You can try to clear the Cache and remove the Cookies for websites that cause problems via the "3-bar" Firefox menu button (Options/Preferences) to see if that fixes it.
I've also seen cases where having "Resist Fingerprinting" enabled caused this issue to occur.
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<ul><li><a href="https://support.mozilla.org/en-US/kb/firefox-protection-against-fingerprinting" rel="nofollow">https://support.mozilla.org/en-US/kb/firefox-protection-against-fingerprinting</a>
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<p>If this all doesn't work then you can try "Forget About This Site" in the right-click context menu of an history item.
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