I was trying to open http://cbseacademic.nic.in/ in Firefox (90.0.2 (64-bit)) and Chrome (Version 92.0.4515.107 (Official Build) (64-bit)) in my Windows 10 laptop.
In Firefox, I got this error:
The connection has timed out
The server at cbseacademic.nic.in is taking too long to respond.
- The site could be temporarily unavailable or too busy. Try again in a few moments.
- If you are unable to load any pages, check your computer’s network connection.
- If your computer or network is protected by a firewall or proxy, make sure that Firefox is permitted to access the Web.
In Chrome, I got this error:
This site can’t be reached
cbseacademic.nic.in took too long to respond.
Try:
- Checking the connection
- Checking the proxy and the firewall
- Running Windows Network Diagnostics
ERR_CONNECTION_TIMED_OUT
I tried accessing the website in a phone and the website opened. So there's no issue with the website.
I ran Firefox in troubleshoot mode and I was able to access the website.
Then I found that the issue was because of HTTPS Everywhere (https://chrome.google.com/webstore/detail/https-everywhere/gcbommkclmclpchllfjekcdonpmejbdp, https://addons.mozilla.org/en-GB/firefox/addon/https-everywhere/), a browser extension. Version of HTTPS Everywhere: 2021.7.13 (in both Firefox and Chrome).
Why is HTTPS Everywhere not allowing me to access http://cbseacademic.nic.in/ and how do I fix the issue?

