What does the CCK2 do?
CAPSCheckLoadURI.jsm
Allows pref("capability.policy.default.checkloaduri.enabled", "allAccess"); to work.
CAPSClipboard.jsm
CAPSClipboard-fs.js
Brings back the clipboard security API
CCK2AboutAddonsOverlay.jsm
Fixes the bolding on the about dialog
CCK2AboutDialogOverlay.jsm
Workaround https://bugzilla.mozilla.org/show_bug.cgi?id=1132971
Hide the "Install Add-on From File" menu if xpinstall.enabled is false
Hides the discover pane if xpinstall.enabled is false
Hides the add-on entry if specified in the CCK2 config
CCK2AboutHomeOverlay.jsm
Remove the sync button if Sync is disabled
Remove the Addons button if Sync is disabled
Remove the snippets if snippets are disabled
CCK2AboutSupportOverlay.jsm
Remove the reset Firefox button if disableResetFirefox is set
Remove the safe mode Button if disableSafeMode is set
Remove the box if both are set
CCK2BrowserOverlay.jsm
Modify the browser UI
CCK2FileBlock.jsm
Prevent certain files from being loaded in the browser (browser.xul)
CCK2PreferencesOverlay.jsm
Removes private browsing from the pref UI if it is disabled
Removes Sync from the pref UI if it is diabled
Disables the crash reporter button if crash reporter is disabled
Removed the master password UI if it is disabled
Goes through the hiddenUI list and hides any UI
CCK2.jsm
Sets prefs
disables about
disable in page search providers
hide UI
Bookmarks
Certs