According to a decision by UX and PM, please see https://bugzilla.mozilla.org/show_bug.cgi?id=1705060#c2, in Firefox we should first of all *not* display the notification-bar for signatures. Secondly, as can also be seen there, we shouldn't display the notification-bar *at all* and it's thus disabled in https://bugzilla.mozilla.org/show_bug.cgi?id=1705327.
If we purposely don't display a notification, for documents with signatures, in the *built in* Firefox PDF Viewer then it cannot be necessary in the GENERIC viewer either.
Most of the files in this folder (except for the en-US folder) have been
imported from the Firefox Nightly branch;
please see https://hg.mozilla.org/l10n-central. Some of the files are
licensed under the MPL license. You can obtain a copy of the license at
https://mozilla.org/MPL/2.0.
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