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Firefox get in the way of displaying webpages that work before

Firefox Tracking protection
Rolf D Ebert
Rolf D Ebert

How can I fix this 

Fingerprinting Protection is altering screen.availWidth and screen.availHeight. These values may not match your actual screen dimensions. This protection helps prevent websites building a fingerprint that can be used to track users. Learn more: https://support.mozilla.org/kb/firefox-protection-against-fingerprinting <anonymous code>:6161:7
How can I fix this Fingerprinting Protection is altering screen.availWidth and screen.availHeight. These values may not match your actual screen dimensions. This protection helps prevent websites building a fingerprint that can be used to track users. Learn more: https://support.mozilla.org/kb/firefox-protection-against-fingerprinting <anonymous code>:6161:7

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