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WLDCore.dll is missing when clicking on email links on websites.

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  • 1 has this problem
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  • Last reply by simdmuk

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Since the latest FF update,any email link on any website now produces the message pictured. Apart from the now usual incredibly slow response by FF to open anything (Facebook in particular) this latest insult to FF users makes the browser almost unusable !

I tried the same links with Edge and the links work fine,this only happened since FF 54 came into being.

Perhaps you'd like to fix this latest broken FF update.

Since the latest FF update,any email link on any website now produces the message pictured. Apart from the now usual incredibly slow response by FF to open anything (Facebook in particular) this latest insult to FF users makes the browser almost unusable ! I tried the same links with Edge and the links work fine,this only happened since FF 54 came into being. Perhaps you'd like to fix this latest broken FF update.
Attached screenshots

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What email program are you using now? That message is from Windows Live Mail. If Firefox is supposed to be sending the link to a different program, please fix the setting on the Options page, Applications panel. More info in this article: Change the program used to open email links.

I'm not sure what to tell you about websites opening slowly in Firefox 54. What was the last version that didn't have that problem -- Firefox 53 or something earlier?

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Email program is Windows Live Mail 2012 which has not been changed.

Googling the above error this fix was from Microsoft : "The problem is with your third-party browser, although I've never seen an explanation for this curious behaviour. WLDCore.dll is one of several core libraries that are used by the various bits of the Windows Live suite. For this reason, it and its associates are kept in a shared folder, whose location is recorded in the PATH variable. Why it should be invisible only when the program is invoked from Chrome or Firefox is a mystery to me.

You'll find the file here on a 64-bit system:


C:\Program Files (x86)\Windows Live\Shared

so you could copy it from there to


C:\Program Files (x86)\Windows Live\Mail"

This fix worked and other sources stated it was a browser error.FF is the one browser on my machine which didnt work.

As for slow loading etc this has been progressive way back to FF 40 odd something.Alot of sites are OK but some like Facebook have been getting slower or freeze since FF 50. Edge however which I rarely use, I found to be much quicker and Facebook doesn't freeze or slowly load news feed pages.