Make default tab position configurable

[danielnixon]

This add-on will respect the value of Firefox's newTabPosition if it's available. If it's not available, this add-on will fall back on relatedAfterCurrent, which happens to be the default value of that setting. There is no such equivalent setting available in Chrome that is exposed to add-on authors (that I'm aware of). I recommend you use Firefox (for all sorts of reasons).

If we added an add-on setting for this value, it would work everywhere (including Chrome and earlier versions of Firefox).

[danielnixon]

https://github.com/danielnixon/link-fixer/blob/master/background-script.js#L100-L120

[assiless]

I've patched it like this, and I've got a good user experience

diff --git a/background-script.js b/background-script.js
index a9b19fe..0177f64 100644
--- a/background-script.js
+++ b/background-script.js
@@ -84,7 +84,7 @@ const tabPositions = {
     const lastTabOpenedBySenderTab = last(tabsOpenedBySenderTab);
     return lastTabOpenedBySenderTab !== undefined
       ? lastTabOpenedBySenderTab.index + 1
-      : undefined;
+      : senderTab.index + 1;
   },
   /**
    * @param {chrome.tabs.Tab} senderTab