Firefox 21 not proceeding to URL

[Jerry]

On Fri, 28 Jun 2013 21:46:43 +0400
Boris Samorodov articulated:

> This works for me: Edit -> Prefernces -> Applications -> PDF:
> preview in Firefox. As well as other viewer (mupdf tested).
> My current Firefox version is 22.0 though. But I recall it
> working at previous firefox versions.

I have tried every setting listed under the TAB, but they all fail.

-- 
Jerry ♔

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