Add :keepalt.

common/content/tabs.js

@@ -353,6 +353,27 @@ function Tabs() //{{{
             literal: 0
         });
 
+    commands.add(["keepa[lt]"],
+        "Execute a command without changing the current alternate buffer",
+        function (args)
+        {
+            let alternate = tabs.alternate;
+
+            try
+            {
+                liberator.execute(args[0], null, true);
+            }
+            finally
+            {
+                tabs.updateSelectionHistory([tabs.getTab(), alternate]);
+            }
+        },
+        {
+            argCount: "+",
+            completer: function (context) completion.ex(context),
+            literal: 0
+        });
+
     // TODO: this should open in a new tab positioned directly after the current one, not at the end
     commands.add(["tab"],
         "Execute a command and tell it to output in a new tab",
@@ -1167,12 +1188,15 @@ function Tabs() //{{{
         // alternate after a restart is often incorrectly tab 1 when there
         // shouldn't be one yet.
         /**
-         * Called on each TabSelect event to update the tab selection history.
+         * Sets the current and alternate tabs, updating the tab selection
+         * history.
+         *
+         * @param {Array(Object)} tabs The current and alternate tab.
          * @see tabs#alternate
          */
-        updateSelectionHistory: function ()
+        updateSelectionHistory: function (tabs)
         {
-            alternates = [this.getTab(), alternates[0]];
+            alternates = tabs || [this.getTab(), alternates[0]];
         }
     };
     //}}}

vimperator/NEWS

@@ -18,6 +18,7 @@
       (this might change again, as this is REALLY inconsistent, and i don't
        know if I like copying bugs)
 
+    * add [c]:keepalt[c]
     * add [c]:styledisable[c], [c]:styleenable[c], and [c]:styletoggle[c]
     * add [c]:sanitize[c], 'sanitizetimespan' and 'sanitizeitems'
     * add [c]:verbose[c]

vimperator/locale/en-US/index.txt

@@ -207,6 +207,7 @@ section::Ex{nbsp}commands[ex-cmd-index,:index]
 ||[c]:iunmap[c]|| Remove a mapping in Insert mode +
 ||[c]:javascript[c]|| Run a JavaScript command through eval() +
 ||[c]:jumps[c]|| Show jumplist +
+||[c]:keepalt[c]|| Execute a command without changing the current alternate buffer +
 ||[c]:let[c]|| Set or list a variable +
 ||[c]:loadplugins[c]|| Immediately load all unloaded plugins +
 ||[c]:macros[c]|| List all macros +

vimperator/locale/en-US/tabs.txt

@@ -12,6 +12,21 @@ section::Listing{nbsp}tabs[listing-tabs]
 ________________________________________________________________________________
 Show a list of buffers (=tabs) matching [a][filter][a]. Without [a][filter][a]
 list all tabs.
+
+A buffer may be marked with one of the following indicators:
+
+[frame="topbot",grid="none",cols="1,10"]
+|===============================================================================
+|*%*|The current buffer
+|*#*|The alternate buffer for [c]:e #[c] and [m]<C-^>[m]
+|===============================================================================
+________________________________________________________________________________
+
+
+|:keepa| |:keepalt| +
+||:keepa[lt] {cmd}||
+________________________________________________________________________________
+Execute a command without changing the current alternate buffer.
 ________________________________________________________________________________
 
 section::Opening{nbsp}tabs[opening-tabs]

xulmus/locale/en-US/all.txt

@@ -2,6 +2,7 @@
 
 // TODO: this should be generated by the Makefile in the same order as
 // config.helpFiles
+
 |intro.html|
 
 include::intro.txt[]

xulmus/locale/en-US/index.txt

@@ -246,6 +246,7 @@ section::Ex{nbsp}commands[ex-cmd-index,:index]
 ||[c]:iunmap[c]|| Remove a mapping in Insert mode +
 ||[c]:javascript[c]|| Run a JavaScript command through eval() +
 ||[c]:jumps[c]|| Show jumplist +
+||[c]:keepalt[c]|| Execute a command without changing the current alternate buffer +
 ||[c]:let[c]|| Set or list a variable +
 ||[c]:load[c]|| Load a playlist +
 ||[c]:loadplugins[c]|| Immediately load all unloaded plugins +

xulmus/locale/en-US/tabs.txt

@@ -12,6 +12,21 @@ section::Listing{nbsp}tabs[listing-tabs]
 ________________________________________________________________________________
 Show a list of buffers (=tabs) matching [a][filter][a]. Without [a][filter][a]
 list all tabs.
+
+A buffer may be marked with one of the following indicators:
+
+[frame="topbot",grid="none",cols="1,10"]
+|===============================================================================
+|*%*|The current buffer
+|*#*|The alternate buffer for [c]:e #[c] and [m]<C-^>[m]
+|===============================================================================
+________________________________________________________________________________
+
+
+|:keepa| |:keepalt|
+||:keepa[lt] {cmd}||
+________________________________________________________________________________
+Execute a command without changing the current alternate buffer.
 ________________________________________________________________________________
 
 section::Opening{nbsp}tabs[opening-tabs]