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Firefox keeps trying to prepend "www." to a URL I type in the location bar.

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I have gone to about:config and toggled browser.fixup.alternate.enabled to false and have even changed browser.fixup.alternate.prefix to a blank value. Nothing changed. Firefox still insists on prepending www to my URL.

How do I disable this colossally stupid and aggravating "feature"?

I have gone to about:config and toggled browser.fixup.alternate.enabled to false and have even changed browser.fixup.alternate.prefix to a blank value. Nothing changed. Firefox still insists on prepending www to my URL. How do I disable this colossally stupid and aggravating "feature"?

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Does that happen with all URLs?

Firefox may still have a cached version of the www. version of the URL.

Clear the cache and the cookies from sites that cause problems.

"Clear the Cache":

  • Tools > Options > Advanced > Network > Offline Storage (Cache): "Clear Now"

"Remove Cookies" from sites causing problems:

  • Tools > Options > Privacy > Cookies: "Show Cookies"