Add tabclose functionality

src/excmds_background.ts

@@ -46,6 +46,17 @@ namespace ExCmds {
         browser.tabs.update(id,{active:true})
     }
 
+    export function closetabs(ids: number[]){
+        browser.tabs.remove(ids)
+    }
+
+    export async function tabclose(n = 1){
+        let filtTabs = await browser.tabs.query({active: true})
+        let activeTabID = filtTabs[0].id
+        // TODO: work out what the ids of the next n tabs are and close them also
+        closetabs([activeTabID])
+    }
+
     /** Switch to the next tab by index (position on tab bar), wrapping round.
 
         optional increment is number of tabs forwards to move.

src/parsing.ts

@@ -14,6 +14,7 @@ namespace Parsing {
             ["j", "scrolldownline"],
             ["H", "historyback"],
             ["L", "historyforward"],
+            ["d", "tabclose"],
             ["k", "scrollupline"],
             ["gt", "tabnext"],
             ["gT", "tabprev"],