Remove some redundant version-specific code.

common/content/commandline.js

@@ -263,16 +263,6 @@ var CommandWidgets = Class("CommandWidgets", {
         }
         [this.commandbar.container, this.statusbar.container].forEach(check);
 
-        // Work around a redrawing bug.
-        if (changed && config.haveGecko("16", "20")) {
-            util.delay(function () {
-                // Urgh.
-                statusline.statusBar.style.paddingRight = "1px";
-                DOM(statusline.statusBar).rect; // Force reflow.
-                statusline.statusBar.style.paddingRight = "";
-            }, 0);
-        }
-
         if (this.initialized && loaded.mow && mow.visible)
             mow.resize(false);
     },

common/content/dactyl.js

@@ -1367,10 +1367,6 @@ var Dactyl = Module("dactyl", XPCOM(Ci.nsISupportsWeakReference, ModuleBase), {
                     styles.system.add("taboptions", "chrome://*",
                                       classes.length ? classes.join(",") + "{ display: none; }" : "");
 
-                    if (!dactyl.has("Gecko2")) {
-                        tabs.tabBinding.enabled = Array.some(opts, k => k in this.opts);
-                        tabs.updateTabCount();
-                    }
                     if (config.tabbrowser.tabContainer._positionPinnedTabs)
                         config.tabbrowser.tabContainer._positionPinnedTabs();
                 },

common/content/tabs.js

@@ -73,7 +73,6 @@ var Tabs = Module("tabs", {
 
     updateTabCount: function updateTabCount() {
         for (let [i, tab] in Iterator(this.visibleTabs)) {
-            if (dactyl.has("Gecko2")) {
             let node = function node(class_) document.getAnonymousElementByAttribute(tab, "class", class_);
             if (!node("dactyl-tab-number")) {
                 let img = node("tab-icon-image");
@@ -96,7 +95,6 @@ var Tabs = Module("tabs", {
                     });
                 }
             }
-            }
             tab.dactylOrdinal = i + 1;
         }
         statusline.updateTabCount(true);
@@ -1224,7 +1222,7 @@ var Tabs = Module("tabs", {
                         tabs.tabStyle.enabled = false;
                     }
 
-                    if (value !== "multitab" || !dactyl.has("Gecko2"))
+                    if (value !== "multitab")
                         if (tabs.xulTabs)
                             tabs.xulTabs.visible = value !== "never";
                         else

common/modules/addons.jsm

@@ -110,7 +110,6 @@ var actions = {
         name: "extr[ehash]",
         description: "Reload an extension",
         action: function (addon) {
-            util.assert(config.haveGecko("2b"), _("command.notUseful", config.host));
             util.flushCache();
             util.timeout(function () {
                 addon.userDisabled = true;

common/modules/base.jsm

@@ -734,19 +734,6 @@ function Class(...args) {
     if (callable(args[0]))
         superclass = args.shift();
 
-    if (loaded.config && (config.haveGecko("5.*", "6.0") || config.haveGecko("6.*"))) // Bug 657418.
-        var Constructor = function Constructor() {
-            var self = Object.create(Constructor.prototype);
-            self.instance = self;
-            self.globalInstance = self;
-
-            if ("_metaInit_" in self && self._metaInit_)
-                self._metaInit_.apply(self, arguments);
-
-            var res = self.init.apply(self, arguments);
-            return res !== undefined ? res : self;
-        };
-    else
     var Constructor = eval(String.replace('\n\
         (function constructor(PARAMS) {                      \n\
             var self = Object.create(Constructor.prototype); \n\

common/modules/buffer.jsm

@@ -78,12 +78,8 @@ var Buffer = Module("Buffer", {
      *      callback is not provided.
      */
     getPref: function getPref(pref, callback) {
-        // God damn it.
-        if (config.haveGecko("19.0a1"))
         services.contentPrefs.getPref(this.uri, pref,
                                       sanitizer.getContext(this.win), callback);
-        else
-            services.contentPrefs.getPref(this.uri, pref, callback);
     },
 
     /**
@@ -525,8 +521,6 @@ var Buffer = Module("Buffer", {
             };
 
             DOM(elem).mousedown(params).mouseup(params);
-            if (!config.haveGecko("2b"))
-                DOM(elem).click(params);
 
             let sel = util.selectionController(win);
             sel.getSelection(sel.SELECTION_FOCUS_REGION).collapseToStart();

common/modules/config.jsm

@@ -51,8 +51,6 @@ var ConfigBase = Class("ConfigBase", {
         this.loadConfig();
 
         this.features.push = deprecated("Set.add", function push(feature) Set.add(this, feature));
-        if (this.haveGecko("2b"))
-            Set.add(this.features, "Gecko2");
 
         JSMLoader.registerFactory(JSMLoader.Factory(AboutHandler));
         JSMLoader.registerFactory(JSMLoader.Factory(
@@ -160,17 +158,6 @@ var ConfigBase = Class("ConfigBase", {
         highlight.loadCSS(this.helpCSS.replace(/__MSG_(.*?)__/g,
                                                (m0, m1) => _(m1)));
 
-        if (!this.haveGecko("2b"))
-            highlight.loadCSS(literal(/*
-                !TabNumber               font-weight: bold; margin: 0px; padding-right: .8ex;
-                !TabIconNumber  {
-                    font-weight: bold;
-                    color: white;
-                    text-align: center;
-                    text-shadow: black -1px 0 1px, black 0 1px 1px, black 1px 0 1px, black 0 -1px 1px;
-                }
-            */));
-
         let hl = highlight.set("Find", "");
         hl.onChange = function () {
             function hex(val) ("#" + util.regexp.iterate(/\d+/g, val)

common/modules/dom.jsm

@@ -1354,14 +1354,11 @@ var DOM = Class("DOM", {
          * @param {Node} target The DOM node to which to dispatch the event.
          * @param {Event} event The event to dispatch.
          */
-        dispatch: Class.Memoize(function ()
-            config.haveGecko("2b")
-                ? function dispatch(target, event, extra) {
+        dispatch: function dispatch(target, event, extra) {
             try {
                 this.feedingEvent = extra;
 
                 if (target instanceof Ci.nsIDOMElement)
-                            // This causes a crash on Gecko<2.0, it seems.
                     return (target.ownerDocument || target.document || target).defaultView
                            .QueryInterface(Ci.nsIInterfaceRequestor).getInterface(Ci.nsIDOMWindowUtils)
                            .dispatchDOMEventViaPresShell(target, event, true);
@@ -1377,15 +1374,6 @@ var DOM = Class("DOM", {
                 this.feedingEvent = null;
             }
         }
-                : function dispatch(target, event, extra) {
-                    try {
-                        this.feedingEvent = extra;
-                        target.dispatchEvent(update(event, extra));
-                    }
-                    finally {
-                        this.feedingEvent = null;
-                    }
-                })
     }),
 
     createContents: Class.Memoize(() => services.has("dactyl") && services.dactyl.createContents