<Solved>Firefox won't open several websites

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whois1230
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<Solved>Firefox won't open several websites

Post by whois1230 » Fri Jan 05, 2018 10:55 am

Hello, I deleted my certificates from Mozilla Firefox/Preferences/Privacy & Security/Certificates/View Certificates. Now I can't open several websites, including:
https://mail.protonmail.com/login
yahoo mail
https://sites.google.com
https://www.amazon.com/
https://facebook.com/
I get an error which states: Your connection is not secure

The owner of sites.google.com has configured their website improperly. To protect your information from being stolen, Firefox has not connected to this website.

This site uses HTTP Strict Transport Security (HSTS) to specify that Firefox may only connect to it securely. As a result, it is not possible to add an exception for this certificate.
Also, several websites can't open properly(they get opened like this https://imgur.com/Jwrluts ), including:
https://imgur.com/
https://www.gearbest.com/
https://www.aliexpress.com/
https://www.ebay.com/
even though I added these sites as "exceptions" in Firefox.
Last edited by whois1230 on Fri Jan 05, 2018 6:45 pm, edited 1 time in total.

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Flemur
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Re: Firefox won't open several websites

Post by Flemur » Fri Jan 05, 2018 11:25 am

whois1230 wrote:Hello, I deleted my certificates from Mozilla Firefox/Preferences/Privacy & Security/Certificates/View Certificates.
How come?

Reinstalling firefox should fix it. FWIW, my firefox doesn't use whatever's in /usr/share/ca-certificates. (same for vivaldi).
Please edit your original post title to include [SOLVED] if/when it is solved!
Your data and OS are backed up....right?
Mint 18.3 Xfce/fluxbox/pulse-less
Xubuntu 17.10/fluxbox/pulse-less

Cosmo.
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Re: Firefox won't open several websites

Post by Cosmo. » Fri Jan 05, 2018 2:49 pm

Flemur wrote:
whois1230 wrote:Hello, I deleted my certificates from Mozilla Firefox/Preferences/Privacy & Security/Certificates/View Certificates.
How come?
I wonder about the same. By will, by accident (how that)?

A new FF-profile might help.
Close FF.
Open your file-manager and make hidden files visible (press ctrl-h).
Rename the folder .mozilla to .mozilla.bck
Start FF, this will create automatically a new FF-profile.
Check.

To get back to your old profile:
Close FF.
Delete the new folder .mozilla
Rename the folder .mozila.bck back to .mozilla
Start FF. Done.

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Flemur
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Re: Firefox won't open several websites

Post by Flemur » Fri Jan 05, 2018 4:04 pm

Cosmo. wrote:A new FF-profile might help.
I thought it'd be part of the installation since you can open any website right away with no existing profile, but there is
~/.mozilla/firefox/profile-name/cert8.db (196,608 bytes)
Please edit your original post title to include [SOLVED] if/when it is solved!
Your data and OS are backed up....right?
Mint 18.3 Xfce/fluxbox/pulse-less
Xubuntu 17.10/fluxbox/pulse-less

Cosmo.
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Re: Firefox won't open several websites

Post by Cosmo. » Fri Jan 05, 2018 4:08 pm

We don't know why and how the OP removed the certificates (really all of them?). In the hope, that he did not launch FF with elevated rights he would at least from inside of the browser not be able to delete anything from the program folder; out of this scenario the new profile might help.

whois1230
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Re: Firefox won't open several websites

Post by whois1230 » Fri Jan 05, 2018 6:44 pm

Hello, I tried both methods, as suggested by the above posters and it didn't work. I had to combine the 2 methods to restore Firefox to its default state. I uninstalled Firefox, then went to File Manager, pressed Ctrl+h and deleted the .mozilla folder. Only then was I able to open those websites again. Thank you all :)

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