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firefox very slow loading most pages, sometimes error message :"can't find server for......." ....."

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Firefox is very slow loading pages, some pages never load, sometimes error message stating "cannot connect to server" Router is not an issue I don't think as other computer connected to it has no problems. Used Malwarebytes to clean up problems, only 5 found. Internet Explorer does not have the same problems.

Firefox is very slow loading pages, some pages never load, sometimes error message stating "cannot connect to server" Router is not an issue I don't think as other computer connected to it has no problems. Used Malwarebytes to clean up problems, only 5 found. Internet Explorer does not have the same problems.

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The default of the pref network.http.max-connections has been increased from 30 to 256 in Firefox 6+ versions.

Try to decrease the value of the pref network.http.max-connections from 256 to 30 as used in Firefox 3 versions.