Mozilla raised the sword over XPCOM interfaces used by XUL extensions

[JustOff]

They are definitely going to emasculate the core browser code

Here is the short list of the corresponding bugs based on the current state of bug #1347507:

• Remove support for Date.prototype.toLocaleFormat
• Decommission nsIDownloadManager
• Stop building nsIEntityConverter and its property files on mobile
• Remove SpiderMonkey support for ECMAScript for XML for-each
• Remove SpiderMonkey support for JS1.7 legacy generators
• Remove nsIProgrammingLanguage
• Remove nsIStackFrame::language
• Remove nsISaveAsCharset & nsSaveAsCharset from m-c
• Get addons to stop using DOM_OBJECT classinfo
• Get rid of nsIUnicodeNormalizer interface
• Deprecate nsIScriptableDateFormat
• Remove nsIJSON
• Remove extensions.ini
• Remove nsIScriptableUnicodeConverter
• Remove nsIConverterInputStream
• Remove nsIConverterOutputStream
• Deprecate nsIScriptableInputStream and nsIStringInputStream
• Remove nsILocaleService
• Remove UI, extension, and child_process modules
• Remove FUEL
• Disable named property object visibility on Xrays across the board once 57 ships
• Deprecate and remove nsLocaleService, nsILocaleService, nsLocale, and nsPosixLocale
• Remove nsISimpleContentPolicy
• Remove support for SourceHook
• Remove nsIPrefBranch2 and nsIPrefBranchInternal
• nsIDOMWindow and nsIDOMWindowInternal
• Remove nsILocalFile
• Try to remove some shutdown observer notifications
• Remove Promise.jsm
• Remove nsHTMLEntities.cpp
• PrintPreview should only be allowed on nsIWebBrowserPrint when retrieved through the docshell.
• Remove nsPIEditorTransaction
• Remove Locale.jsm
• Remove support for "skin" chrome registration after removing support for complete themes

The start of the destruction works is scheduled for August 8, 2017 when the nightly channel will reach version 57

[Night Wing]

Firefox is my #3 browser on all of my Windows 7 hard drives. When Firefox 57 is released this upcoming November 14th of 2017, I'll delete (then) Firefox 56, install Firefox 52.5 ESR, make a new profile in 52.5 ESR, re-install all of my FF bookmarks and this version of Firefox should take me until June 26th of 2018 so I can escape the mess the regular Firefox 57 is going to create this upcoming November with regards to the many old addons which won't work anymore.

With Firefox 52.5 ESR, I can still use NoSquint Plus and Adblock Plus until June 26th of 2018 since these are the only two addons I use in Firefox. This is my plan unless Mozilla throws me an unexpected curve ball.