all website went "Not Found HTTP Error 404. The requested resource is not found." and the "Firefox cannot load websites but other programs can" page is not help
all website went "Not Found HTTP Error 404. The requested resource is not found." and the "Firefox cannot load websites but other programs can" page is not helping in any way
Chosen solution
A possible cause is security software (firewall,anti-virus) that blocks or restricts Firefox or the plugin-container process without informing you, possibly after detecting changes (update) to the Firefox program.
Remove all rules for Firefox and the plugin-container from the permissions list in the firewall and let your firewall ask again for permission to get full unrestricted access to internet for Firefox and the plugin-container process and the updater process.
See:
You can try to reset (power off/on) the router.
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Chosen Solution
A possible cause is security software (firewall,anti-virus) that blocks or restricts Firefox or the plugin-container process without informing you, possibly after detecting changes (update) to the Firefox program.
Remove all rules for Firefox and the plugin-container from the permissions list in the firewall and let your firewall ask again for permission to get full unrestricted access to internet for Firefox and the plugin-container process and the updater process.
See:
You can try to reset (power off/on) the router.