Possibly stem aforementioned focus bug.

--HG--
branch : bootstrapped

common/modules/base.jsm

@@ -992,6 +992,8 @@ let StructBase = Class("StructBase", Array, {
 
     clone: function clone() this.constructor.apply(null, this.slice()),
 
+    closure: Class.Property(Object.getOwnPropertyDescriptor(Class.prototype, "closure")),
+
     toString: function () Class.prototype.toString.apply(this, arguments),
 
     // Iterator over our named members

common/modules/styles.jsm

@@ -56,6 +56,12 @@ update(Sheet.prototype, {
         }
     },
 
+    match: function (uri) {
+        if (isString(uri))
+            uri = util.newURI(uri);
+        return this.sites.some(function (site) Styles.matchFilter(site, uri));
+    },
+
     get fullCSS() {
         let filter = this.sites;
         let css = this.css;
@@ -476,7 +482,7 @@ var Styles = Module("Styles", {
                 let uris = util.visibleURIs(window.content);
                 context.compare = modules.CompletionContext.Sort.number;
                 context.generate = function () styles.user.sheets;
-                context.keys.active = function (sheet) sheet.sites.some(function (site) uris.some(Styles.matchFilter(site))),
+                context.keys.active = function (sheet) uris.some(sheet.closure.match);
                 context.keys.description = function (sheet) <>{sheet.formatSites(uris)}: {sheet.css.replace("\n", "\\n")}</>
                 if (cmd.filter)
                     context.filters.push(function ({ item }) cmd.filter(item));

common/modules/util.jsm

@@ -930,8 +930,10 @@ var Util = Module("Util", XPCOM([Ci.nsIObserver, Ci.nsISupportsWeakReference]),
             // destroy modules.
             util.timeout(function () {
                 for (let module in values(defineModule.modules))
-                    if (module.cleanup)
+                    if (module.cleanup) {
+                        util.dump("cleanup: " + module.constructor.className);
                         util.trapErrors(module.cleanup, module);
+                    }
 
                 services.observer.addObserver(this, "dactyl-rehash", true);
             });