Thunderbird/Add-ons Guide 57

Add-ons Guide for Thunderbird 57 and beyond

FIRST DRAFT

Mozilla core have disabled "legacy" add-ons in Firefox 57. Since this type of add-on is not supported from mozilla57 any more, a lot of interfaces have been removed from Mozilla core.

These are:

• Removed in mozilla57:
  • nsILocalFile
  • steelIApplication
  • extIApplication, nsIEntityConverter
  • nsIProgrammingLanguage
  • nsILocaleService and friends
  • nsIScriptableDateFormat
  • nsIFilePicker.show()
  • nsIDownloadManager
  • Promise.jsm
  • nsIPrefBranch2 and nsIPrefBranchInternal
  • nsIExternalProtocolService::LoadUrl

• JS and XUL changes in mozilla57 [1]
  • for (x in fixIterator(obj))
  • `for each` construct [2]
  • `with` construct [3]
  • catch (ex if ex instanceof ExceptionType)
  • In XUL files, JS files are linked in with <script type="application/x-javascript" ... > OR <script type="application/x-javascript;version=1.7" ... > (remove `x-` and version)

• Removed in mozilla58
  • {get,set}ComplexValue use of nsISupportsString
  • Mechanism to store add-on preferences in defaults/preferences/xx.js. See bug 1414398

• JS changes in mozilla58 [4]
  • StopIteration [5]

• Removed in mozilla59
  • Inline options. See bug 1419145. Add-ons need to embed a WebExtension to display an options dialog[6][7].

• JS changes in mozilla59 [8]
  • catch (ex if ...)