Hello, unfortunately I can't reproduce this as I can open the page on my Firefox. There is a possibility something is blocking the page to load, try using [https://support.mozilla.org/en-US/kb/diagnose-firefox-issues-using-troubleshoot-mode Troubleshoot mode] and let us know if it worked.

The site is not blocked in the Russian Federation, I installed pure Firefox on a virtual machine and it still does not open. EDGE opens everything without any VPN.

Hello, We're sorry to hear that the page doesn't work as expected. In order to look for the root cause, please follow the steps below and provide us with more information to troubleshoot your issue. # Please check if you have Enhanced Tracking Protection (ETP) enabled. You can do that by clicking the shield [[Image:Fx89ShieldIcon]] icon at the left of the address bar. #* If ETP is enabled, try disabling it. Does the problem persist? # If the problem is not fixed, try [[How to clear the Firefox cache | clearing Firefox cache]]. Does it help? # If it does not help, also try [[Clear cookies and site data in Firefox | clearing cookies and data]] for the website you experience troubles with (''warning: you will be logged out on this website''). Does it help? # If it also does not help, '''try [[Diagnose Firefox issues using Troubleshoot Mode | running Firefox in Troubleshoot Mode]]'''. Does the problem persist? # Finally, if the problem is still not fixed, please check if it persists in other browsers (e.g. Chrome, Edge, Opera or Safari). #* If it does, it is most likely an issue on the website's side. You may want to inform the website owner or administrator about that. #* If it doesn't, that's a compatibility issue. Please '''report it on [https://webcompat.com/issues/new Webcompat]''', so that our team there may be able to look into it. We'd also appreciate posting a link to your report here. <!-- Some additional troubleshooting steps * What kind of ETP setting you have? To find out, go to ''about:preferences#privacy'' and let us know if you set it to Standard/Strict/Custom. '''Check if the issue is caused by Total Cookie Protection (TCP)''' <i>'''WARNING from the moderator team:''' ''Changing Firefox pref from the about:config page can sometimes break Firefox or cause strange behavior. You should only do this if you know what you're doing. Please read [[Firefox advanced customization and configuration options]] to learn more. '' </i> * Go to about:config and check if the pref “''network.cookie.cookieBehavior''” is set at 5, which means that TCP is enabled together with ETP. If the pref value is not 5, then the issue is not TCP-related. * Set the pref “''network.cookie.cookieBehavior''” to 4 and check if the issue still exists. If the issue disappears, then it is a TCP breakage. In that case, you can file a report through [https://mzl.la/anti-tracking-breakage Bugzilla] or reach out the [https://matrix.to/#/#anti-tracking:mozilla.org #anti-tracking] team on Matrix. -->

It's the provider, but why does EDGE open without VPN? I don't know. Opera can't open either.

What happens when you try to view that page? Is there an error message?

At first it loads, loads, after some time it writes "unable to establish connection and blah, blah, blah"

''<p>egor-vtyurin.85 [[#answer-1758721|said]]</p>'' <blockquote>... after some time it writes "unable to establish connection and blah, blah, blah" </blockquote> Can you take a screenshot of that error page, including to the window frame?

screenshot

This support article should help: https://support.mozilla.org/en-US/kb/secure-connection-failed-firefox-did-not-connect