Log Message:
Update to 53.0

Changelog:
New
    Improved graphics stability for Windows users with the addition of \ 
compositor process separation (Quantum Compositor)
    Two new 'compact' themes available in Firefox, dark and light, based on the \ 
Firefox Developer Edition theme
    Lightweight themes are now applied in private browsing windows
    Reader Mode now displays estimated reading time for the page
    Windows 7+ users on 64-bit OS can select 32-bit or 64-bit versions in the \ 
stub installer

Fixed
    Various security fixes

Changed
    Updated the design of site permission requests to make them harder to miss \ 
and easier to understand
    Windows XP and Vista are no longer supported. XP and Vista users running \ 
Firefox 52 will continue to receive security updates on Firefox ESR 52.
    32-bit Mac OS X is no longer supported. 32-bit Mac OS X users can switch to \ 
Firefox ESR 52 to continue receiving security updates.
    Updates for Mac OS X are smaller in size compared to updates for Firefox 52
    New visual design for audio and video controls
    Ended Firefox Linux support for processors older than Pentium 4 and AMD Opteron
    The last few characters of shortened tab titles fade out instead of being \ 
replaced by ellipses to keep more of the title visible

Security fixes:
 #CVE-2017-5433: Use-after-free in SMIL animation functions
 #CVE-2017-5435: Use-after-free during transaction processing in the editor
 #CVE-2017-5436: Out-of-bounds write with malicious font in Graphite 2
 #CVE-2017-5461: Out-of-bounds write in Base64 encoding in NSS
 #CVE-2017-5459: Buffer overflow in WebGL
 #CVE-2017-5466: Origin confusion when reloading isolated data:text/html URL
 #CVE-2017-5434: Use-after-free during focus handling
 #CVE-2017-5432: Use-after-free in text input selection
 #CVE-2017-5460: Use-after-free in frame selection
 #CVE-2017-5438: Use-after-free in nsAutoPtr during XSLT processing
 #CVE-2017-5439: Use-after-free in nsTArray Length() during XSLT processing
 #CVE-2017-5440: Use-after-free in txExecutionState destructor during XSLT processing
 #CVE-2017-5441: Use-after-free with selection during scroll events
 #CVE-2017-5442: Use-after-free during style changes
 #CVE-2017-5464: Memory corruption with accessibility and DOM manipulation
 #CVE-2017-5443: Out-of-bounds write during BinHex decoding
 #CVE-2017-5444: Buffer overflow while parsing application/http-index-format content
 #CVE-2017-5446: Out-of-bounds read when HTTP/2 DATA frames are sent with \ 
incorrect data
 #CVE-2017-5447: Out-of-bounds read during glyph processing
 #CVE-2017-5465: Out-of-bounds read in ConvolvePixel
 #CVE-2017-5448: Out-of-bounds write in ClearKeyDecryptor
 #CVE-2017-5437: Vulnerabilities in Libevent library
 #CVE-2017-5454: Sandbox escape allowing file system read access through file picker
 #CVE-2017-5455: Sandbox escape through internal feed reader APIs
 #CVE-2017-5456: Sandbox escape allowing local file system access
 #CVE-2017-5469: Potential Buffer overflow in flex-generated code
 #CVE-2017-5445: Uninitialized values used while parsing \ 
application/http-index-format content
 #CVE-2017-5449: Crash during bidirectional unicode manipulation with animation
 #CVE-2017-5450: Addressbar spoofing using javascript: URI on Firefox for Android
 #CVE-2017-5451: Addressbar spoofing with onblur event
 #CVE-2017-5462: DRBG flaw in NSS
 #CVE-2017-5463: Addressbar spoofing through reader view on Firefox for Android
 #CVE-2017-5467: Memory corruption when drawing Skia content
 #CVE-2017-5452: Addressbar spoofing during scrolling with editable content on \ 
Firefox for Android
 #CVE-2017-5453: HTML injection into RSS Reader feed preview page through TITLE \ 
element
 #CVE-2017-5458: Drag and drop of javascript: URLs can allow for self-XSS
 #CVE-2017-5468: Incorrect ownership model for Private Browsing information
 #CVE-2017-5430: Memory safety bugs fixed in Firefox 53 and Firefox ESR 52.1
 #CVE-2017-5429: Memory safety bugs fixed in Firefox 53, Firefox ESR 45.9, and \ 
Firefox ESR 52.1