- update to Firefox 56.0 (boo#1060445)
* Firefox Screenshots
* Find Options/Preferences more quickly with new search function
* Media is no longer auto-played when opened in a background tab
* Enable CSS Grid Layout View
MFSA 2017-21
* CVE-2017-7793 (bmo#1371889)
Use-after-free with Fetch API
* CVE-2017-7817 (bmo#1356596) (Android-only)
Firefox for Android address bar spoofing through fullscreen mode
* CVE-2017-7818 (bmo#1363723)
Use-after-free during ARIA array manipulation
* CVE-2017-7819 (bmo#1380292)
Use-after-free while resizing images in design mode
* CVE-2017-7824 (bmo#1398381)
Buffer overflow when drawing and validating elements with ANGLE
* CVE-2017-7805 (bmo#1377618) (fixed via NSS requirement)
Use-after-free in TLS 1.2 generating handshake hashes
* CVE-2017-7812 (bmo#1379842)
Drag and drop of malicious page content to the tab bar can open locally stored files
* CVE-2017-7814 (bmo#1376036)
Blob and data URLs bypass phishing and malware protection warnings
* CVE-2017-7813 (bmo#1383951)
Integer truncation in the JavaScript parser
* CVE-2017-7825 (bmo#1393624, bmo#1390980) (OSX-only)
OS X fonts render some Tibetan and Arabic unicode characters as spaces
* CVE-2017-7815 (bmo#1368981)
Spoofing attack with modal dialogs on non-e10s installations
* CVE-2017-7816 (bmo#1380597)
WebExtensions can load about: URLs in extension UI