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Digital signatures Firefox

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Hello, I am from Ukraine and I use a translator, sorry for that. I have poor physical and mental health. I have Windows XP and there is no possibility to buy a newer computer. Yesterday all my browser extensions were disabled. They are very important to me. I accept and understand all the risks. I beg you, please let me use these extensions. Please help...

Hello, I am from Ukraine and I use a translator, sorry for that. I have poor physical and mental health. I have Windows XP and there is no possibility to buy a newer computer. Yesterday all my browser extensions were disabled. They are very important to me. I accept and understand all the risks. I beg you, please let me use these extensions. Please help...

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But it says "Certificate verification failed - the issuing party is unknown."

www.lr.kr said

But it says "Certificate verification failed - the issuing party is unknown."

Sorry, I didn't notice that. That probably means another certificate is missing from Firefox 50.

But which one? And how does it all work/connect?

I'm sorry, it's not possible for me to investigate Firefox 50 in detail because the source code is no longer online and I am not willing to install it on my computer.

I feel outdated and without a chance for a peaceful existence, just like my PC and browser...

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