Is this any better? https://duckduckgo.com/

There is security software like Avast, Kaspersky, BitDefender and ESET that intercept secure connection certificates and send their own.

https://support.mozilla.org/en-US/kb/firefox-cant-load-websites-other-browsers-can

https://support.mozilla.org/en-US/kb/firefox-and-other-browsers-cant-load-websites

https://support.mozilla.org/en-US/kb/secure-connection-failed-error-message

https://support.mozilla.org/en-US/kb/connection-untrusted-error-message

Websites don't load - troubleshoot and fix error messages

http://kb.mozillazine.org/Error_loading_websites

What do the security warning codes mean

Thank you for your swift answer.

Is this any better? https://duckduckgo.com/

Unfortunately "Hmm. We’re having trouble finding that site."

There is security software like Avast, Kaspersky, BitDefender and ESET that intercept secure connection certificates and send their own.

No such software is installed.

I read the articles you provided but I don`t think they provide the solution:

https://support.mozilla.org/en-US/kb/firefox-cant-load-websites-other-browsers-can

Internet Security software blocking Firefox - most/all other websites can be accessed. Firefox connection settings - no proxy IPv6 - should I do this? Won`t it be causing more problems? DNS Prefetching - does it apply to set search engine? Firefox cannot load certain websites - seems to work sometimes but then again sometimes it is unnecessary - duckduckgo can be spontaneously accessed. Check for malware - highly unlikely Check if an extension is causing the problem - there are two extensions installed Facebook Container and uBlock Origin; disabling them doesn`t change anything

https://support.mozilla.org/en-US/kb/firefox-and-other-browsers-cant-load-websites https://support.mozilla.org/en-US/kb/secure-connection-failed-error-message https://support.mozilla.org/en-US/kb/connection-untrusted-error-message Websites don't load - troubleshoot and fix error messages http://kb.mozillazine.org/Error_loading_websites What do the security warning codes mean

Firefox and other browsers can't load websites - other browsers can load duckduckgo Secure connection failed and Firefox did not connect - haven`t seen Secure Connection Failed or Did Not Connect: Potential Security Issue messages "This Connection is Untrusted" error message appears - What to do - no such message Websites don't load - troubleshoot and fix error messages - leads to this article Error loading websites - problem applies only to a specific website - duckduckgo What do the security warning codes mean? - no security warnings

Last reply by ormac 1 hour ago

Sorry, current forum security sometimes delays the posting of messages. And in turn, we are not notified of those posts.

Start Firefox in Safe Mode {web link}

A small dialog should appear. Click Start In Safe Mode (not Refresh). Is the problem still there?

Start your Computer in safe mode with network support. Then start Firefox. Try Secure websites. Is the problem still there?

http://encyclopedia2.thefreedictionary.com/Linux+Safe+Mode Starting Any Computer In Safe Mode; Free Online Encyclopedia

It took me a while, but I can confirm that starting Firefox in safemode doesn't solve the problem. I struggled a bit with the other suggestion. Linux does not have 'safe mode' per se and the equivalent (runlevel 1) is text based so I couldn't run a gui application (Firefox).

You can check the connection settings.

• Options/Preferences -> General -> Network: Connection -> Settings

If you do not need to use a proxy to connect to internet then try to select "No Proxy" if "Use the system proxy settings" or one of the others do not work properly.

See "Firefox connection settings":

• https://support.mozilla.org/en-US/kb/firefox-cant-load-websites-other-browsers-can

You can use the DNS Lookup tool on the about:networking page to see if the are issues.

Ok, changed to "No proxy" but also updated Firefox. It seems that either of those might have solved my issue. Will test for a few more days before marking the solution.

Well, the issue occurred again today. I checked DNS Lookup tool on the about:networking page and https://duckduckgo.com/, duckduckgo.com, https://www.duckduckgo.com/ return NS_ERROR_UNKNOWN_HOST. However, www.duckduckgo.com returns a proper IP address. After a short while all above addresses where accessible again (no action was taken). Is this some issue on the ISP part as they supply the DNS servers (As per Manjaro wiki)?

Maybe try a different DNS provider. I like https://blog.cloudflare.com/announcing-1111/

Just do a traceroute to your current provider and then to 1.1.1.1 or 1.0.0.1 and see which one is closer and faster.

root@ZBook-17-G2-Tumbleweed:(pts/2) [3:51pm]> tr 1.1.1.1 traceroute to 1.1.1.1 (1.1.1.1), 30 hops max, 60 byte packets 1 190.180.100.69 (190.180.100.69) 0.371 ms 0.961 ms 0.915 ms 2 96.120.72.9 (96.120.72.9) 8.908 ms 8.865 ms 8.926 ms 3 24.124.226.81 (24.124.226.81) 14.440 ms 14.400 ms 14.358 ms 4 68.86.152.213 (68.86.152.213) 16.068 ms 15.903 ms 15.980 ms 5 be-31143-cs04.newark.nj.ibone.comcast.net (96.110.42.45) 17.209 ms be-31113-cs01.newark.nj.ibone.comcast.net (96.110.42.33) 17.169 ms be-31143-cs04.newark.nj.ibone.comcast.net (96.110.42.45) 17.128 ms 6 be-2303-pe03.newark.nj.ibone.comcast.net (96.110.37.74) 15.819 ms be-2403-pe03.newark.nj.ibone.comcast.net (96.110.37.78) 11.502 ms be-2303-pe03.newark.nj.ibone.comcast.net (96.110.37.74) 11.729 ms 7 173.167.58.38 (173.167.58.38) 12.367 ms 12.450 ms 12.264 ms 8 one.one.one.one (1.1.1.1) 11.350 ms 11.457 ms 11.268 ms