Description of problem: evince-browser-plugin causes Firefox freeze. It's because it's build with Gtk3 and NPAPI plugins are supposed to run Gtk2 only, see: http://mxr.mozilla.org/mozilla-central/source/dom/plugins/base/npapi.h#428 The Firefox freeze can be workaround but providing Gtk3 NPAPI plugin does not make any sense - it breaks NPAPI specification and no browser can load it anyway.
Hi, I've proposed a patch to evince which returns an error in NP_Initialize() or at NPP_New() if browser supports Gtk+-1.2 or Gtk+-2.0 only. Firefox doesn't freeze with it but it shows a black rectangle instead. I would expect that it will perform a default action instead or ask. I also proposed a change to WebKit since it always returns '2' for NPNVToolkit in NPN_GetValue() even if it actually supports Gtk3 and should return e.g. '3' (I know, this is not in NPAPI but since WebKit dlopens the plugin before to check whether it links against gtk3 it should be safe for gtk2 plugins too). See https://bugzilla.gnome.org/show_bug.cgi?id=738270 and https://bugs.webkit.org/show_bug.cgi?id=142616 for additional info. I'll wait for evince's and WebKit's upstream decision.
Fedora 22 changed to end-of-life (EOL) status on 2016-07-19. Fedora 22 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. If you are unable to reopen this bug, please file a new report against the current release. If you experience problems, please add a comment to this bug. Thank you for reporting this bug and we are sorry it could not be fixed.
Upstream of WebKit had enough time to fix this. I've pushed a patch to Fedora 25 and rawhide which checks NPNVToolkit value and returns error if it is NPNVGtk12 or NPNVGtk2.
evince-3.21.4-2.fc25 has been submitted as an update to Fedora 25. https://bodhi.fedoraproject.org/updates/FEDORA-2016-37f28e19bc
evince-3.21.4-2.fc25 has been pushed to the Fedora 25 testing repository. If problems still persist, please make note of it in this bug report. See https://fedoraproject.org/wiki/QA:Updates_Testing for instructions on how to install test updates. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2016-37f28e19bc
evince-3.21.4-2.fc25 has been pushed to the Fedora 25 stable repository. If problems still persist, please make note of it in this bug report.