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Firefox shuts down when using a proxy

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I manually configured a proxy (I'll attach the settings in an image below) but after a period of browsing, the browser shuts down automatically, the network settings returning to normal. What is the cause of the problem? I used 2 different proxies, purchased from different providers.

I tried Private Mode (no extensions) and without completing the SOCKS Host section, and it still shuts down by itself.

I manually configured a proxy (I'll attach the settings in an image below) but after a period of browsing, the browser shuts down automatically, the network settings returning to normal. What is the cause of the problem? I used 2 different proxies, purchased from different providers. I tried Private Mode (no extensions) and without completing the SOCKS Host section, and it still shuts down by itself.

Kaikki vastaukset (1)

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I couldn't upload the image on the site either. You probably have problems with this as well.

Here is the configuration - https://ibb.co/34g8G9v