Can't access to VirusTotal URL in FireFox

[harlan4096]

<p><strong>Reproduction steps:</strong></p>
<p><span>Open FireFox, type URL: </span><span><a href="https://www.virustotal.com/gui/file/6e1e0517e8d86845b970592ec72a28eea2c5817c5810133290233f0917fec5f8" target="_blank" rel="noopener">VirusTotal</a> </span></p>
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<p><strong>Actual result:</strong></p>
<p><span>FF remains waiting... site in blank...</span></p>
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<p><span>If I exit KTS2021 from running, then I can access...</span></p>
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<p><strong>Expected Result:</strong></p>
<p><span>Access normally to the URL...</span></p>
<p><span></span></p>
<p><span>Screen-shot: https://cloud.qainfo.ru/s/KTJIOpWFkjbVlGW</span></p>
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[harlan4096]

<p>Just tested the same URL with FF + KTS2020 Patch E beta, and it is working fine...</p>
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[harlan4096]

<p>I've tested again the access to this URL and now I can access without issues (KTS2021 .907 + FF70)...</p>