Log Message:
Update to 46.0

* Drop buildlink to gstreamer1

Changelog:
New
    Improved security of the JavaScript Just In Time (JIT) Compiler
    GTK3 integration (GNU/Linux only)

Fixed
    Correct rendering for scaled SVGs that use a clip and a mask
    Various security fixes
    Screen reader behavior with blank spaces in Google Docs corrected

Changed
    WebRTC fixes to improve performance and stability

Developer
    Display dominator trees in Memory tool
    Allocation and garbage collection pause profiling in the performance panel
    Launch responsive mode from the Style Editor @media sidebar

HTML5
    Added support for document.elementsFromPoint
    Added HKDF support for Web Crypto API

Fixed in Firefox 46
    2016-48 Firefox Health Reports could accept events from untrusted domains
    2016-47 Write to invalid HashMap entry through JavaScript.watch()
    2016-46 Elevation of privilege with chrome.tabs.update API in web extensions
    2016-45 CSP not applied to pages sent with multipart/x-mixed-replace
    2016-44 Buffer overflow in libstagefright with CENC offsets
    2016-43 Disclosure of user actions through JavaScript with motion and \ 
orientation sensors
    2016-42 Use-after-free and buffer overflow in Service Workers
    2016-41 Content provider permission bypass allows malicious application to \ 
access data
    2016-40 Privilege escalation through file deletion by Maintenance Service updater
    2016-39 Miscellaneous memory safety hazards (rv:46.0 / rv:45.1 / rv:38.8)