Though many of them can if you use something like this to dig into the browser internals:
var {Cc, Ci} = require("chrome");
Then just use "Cc" instead of "Components.classes" and "Ci" instead of "Components.interfaces" for anything that needs them.
For example, the code in the "adding a stylesheet" section of this page ( https://developer.mozilla.org/en/Using_the_Stylesheet_Servic... ) would look like this:
var sss = Cc["@mozilla.org/content/style-sheet-service;1"]
.getService(Ci.nsIStyleSheetService);
var ios = Cc["@mozilla.org/network/io-service;1"]
.getService(Ci.nsIIOService);
var uri = ios.newURI("chrome://myext/content/myext.css", null, null);
sss.loadAndRegisterSheet(uri, sss.USER_SHEET);
(Assuming you actually have a stylesheet registered at "chrome://myext/content/myext.css", you will just have registered it with the stylesheet service, and it will take effect immediately.)
Comments
Though many of them can if you use something like this to dig into the browser internals: var {Cc, Ci} = require("chrome");
Then just use "Cc" instead of "Components.classes" and "Ci" instead of "Components.interfaces" for anything that needs them.
For example, the code in the "adding a stylesheet" section of this page ( https://developer.mozilla.org/en/Using_the_Stylesheet_Servic... ) would look like this: var sss = Cc["@mozilla.org/content/style-sheet-service;1"] .getService(Ci.nsIStyleSheetService); var ios = Cc["@mozilla.org/network/io-service;1"] .getService(Ci.nsIIOService); var uri = ios.newURI("chrome://myext/content/myext.css", null, null); sss.loadAndRegisterSheet(uri, sss.USER_SHEET);
(Assuming you actually have a stylesheet registered at "chrome://myext/content/myext.css", you will just have registered it with the stylesheet service, and it will take effect immediately.)