Hi,

The symptoms are really close to this bug I opened :
https://bugzilla.mozilla.org/show_bug.cgi?id=1374395 (regarding
accessing local files through XHR with Firefox 54).

One workaround is to disable e10s, but you might want to try the other
workaround, which is to set browser.tabs.remote.separateFileUriProcess
to true.

They marked it as fixed in Firefox 55.

However, they marked version 52 ESR as "unaffected". Maybe you could
check with the testcase? Because if it's really affected, we should ask
to backport the fix to the ESR branch too.

Regards,

Mossroy


Le 02/08/2017 à 10:23, Sebastian Metzger a écrit :
> Hello everybody,
>
> we are using localfilelinks to open documents on file shares directly
> from our wiki-webpages.
> We set the following entries in prefs.js:
> user_pref("capability.policy.localfilelinks.checkloaduri.enabled",
> "allAccess");
> user_pref("capability.policy.localfilelinks.sites",
> "https://wiki-page.de";);
> user_pref("capability.policy.policynames", "localfilelinks");
>
> After the update to ESR52 we noticed, that some users can't use this
> links anymore.
> They see the following error-page:
>
> translation: fileAccessDenied
>
> We then realized that all users with e10s enabled get the error, but
> some users (including me) had the pref:
> extensions.e10sBlockedByAddons set to true and therefore e10s disabled
> and we can still use the links.
> I assume that Selenium or SQLite-Manager is causing my disabled e10s.
>
> Therefore it seems that there is a interdependency between enabled
> e10s and configured localfilelinks.
>
> I know that localfilelinks is only tolerated and was re-integrated in
> one of the last esr's.
> We try to convince our users not to use it, but you know... as long as
> there is a way (and there is one -> deactivate e10s) users will use it.
>
> Can anybody confirm this or has a solution?
> Best regards
>
> Sebastian Metzger
>
> -- 
> Sebastian Metzger
>
> Debeka Krankenversicherungsverein a. G.
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