Add "t" option to 'complete'. Visually it looks odd, that the icons are

more indented than others, we might want to remove or at least move the
% and # indicators

common/content/liberator.js

@@ -1491,7 +1491,20 @@ const liberator = (function () //{{{
             // convert the string to an array of converted URLs
             // -> see util.stringToURLArray for more details
             if (typeof urls == "string")
+            {
+                // rather switch to the tab instead of opening a new url in case of "12: Tab Title" like "urls"
+                if (liberator.has("tabs"))
+                {
+                    let matches = urls.match(/^(\d+):/);
+                    if (matches)
+                    {
+                        tabs.select(parseInt(matches[1], 10) - 1, false); // make it zero-based
+                        return;
+                    }
+                }
+
                 urls = util.stringToURLArray(urls);
+            }
 
             if (urls.length > 20 && !force)
             {

common/content/tabs.js

@@ -645,6 +645,10 @@ function Tabs() //{{{
             { argCount: "0" });
     }
 
+    completion.addUrlCompleter("t",
+        "Open tabs",
+        completion.buffer);
+
     /////////////////////////////////////////////////////////////////////////////}}}
     ////////////////////// PUBLIC SECTION //////////////////////////////////////////
     /////////////////////////////////////////////////////////////////////////////{{{

common/content/ui.js

@@ -770,7 +770,7 @@ function CommandLine() //{{{
 
     options.add(["complete", "cpt"],
         "Items which are completed at the :open prompts",
-        "charlist", "slf",
+        "charlist", typeof(config.defaults["complete"]) == "string" ? config.defaults["complete"] : "slf",
         {
             completer: function (context) [k for each (k in completion.urlCompleters)],
             validator: Option.validateCompleter

vimperator/NEWS

@@ -1,5 +1,6 @@
 2009-XX-XX:
     * version 2.2a1pre
+    * IMPORTANT: the 'complete' option's default has changed (again) to "stlf"
     * IMPORTANT: Map.flags has been replaced with individual properties.
       Mappings defined in plugins with mappings.add will need to be updated.
 ...................................
@@ -15,7 +16,10 @@
 ...................................
     * IMPORTANT: shifted key notation now matches Vim's behaviour. E.g. <C-a>
       and <C-A> are equivalent, to map the uppercase character use <C-S-A>.
+      (this might change again, as this is REALLY inconsistent, and i don't
+       know if I like copying bugs)
 
+    * new "t" option for 'complete' to also switch to open tabs with :open
     * add [c]:toolbaropen[c], [c]:toolbarclose[c], and [c]:toolbartoggle[c]
     * make [c]:open[c] behavior match that of [c]:tabopen[c] and [c]:winopen[c]
       when no argument is specified

vimperator/content/config.js

@@ -34,6 +34,7 @@ const config = { //{{{
     /*** optional options, there are checked for existence and a fallback provided  ***/
     features: ["bookmarks", "hints", "history", "marks", "quickmarks", "session", "tabs", "tabs_undo", "windows"],
     defaults: {
+        complete: "stlf",
         guioptions: "rb",
         showtabline: 2,
         titlestring: "Vimperator"

vimperator/locale/en-US/browsing.txt

@@ -59,6 +59,12 @@ tag "linux" and which contain "torvalds". Note that -tags support is only
 available for tab completion, not for the actual command.
 The items which are completed on [m]<Tab>[m] are specified in the 'complete'
 option.
+
+Sometimes, you might not be aware if you already have a certain page loaded in
+some background tab or not. Therefore you can just type [c]:open facebook<Tab>[c]
+and switch to it if Facebook is already open, or otherwise open it (if you
+have Facebook in your bookmarks or history cache). This behavior can be turned
+off by removing "t" from your 'complete' option.
 ________________________________________________________________________________
 
 

vimperator/locale/en-US/options.txt

@@ -221,7 +221,7 @@ ____
 
 
 |\'cpt'| |\'complete'|
-||'complete' 'cpt'|| charlist (default: slf)
+||'complete' 'cpt'|| charlist (default: stlf)
 ____
 Items which are completed at the [c]:open[c] prompts. Available items:
 
@@ -231,7 +231,8 @@ Items which are completed at the [c]:open[c] prompts. Available items:
 *l* Firefox location bar entries (bookmarks and history sorted in an intelligent way)
 *b* Bookmarks
 *h* History
-*S* Suggest engines
+*S* Search engine suggestions
+*t* Open tabs
 -------------------------------------------------------------------------------------
 
 The order is important, so [c]:set complete=bs[c] would list bookmarks first,