unable to scroll until I switch to safe mode?

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firefox opened the site but did not open a new tab and could not scroll down

The answer

Start Firefox to resolve Firefox issues in Safe Mode to check if any of the extensions or hardware acceleration is causing the problem (skip to Firefox (Tools)> Additions> Appearance / Themes).

Do not change the safe mode start window.
https://support.mozilla.com/kb/Safe+Mode

Tools> Options> Advanced> General> Navigation: "Use hardware acceleration when available"

If disabling hardware acceleration is working, check if there is an update available for your graphics display driver.