fix 'F' and 'et'

reported by @alexnguyennn (#1001). note that mozilla's original patch
[1] (lazily) imports BrowserUtils.sys.mjs while we just reuse the one
from the window object (like we did in v0.27.1). this patch seems to
have been uplifted into devedition 126 as well as nightly 127.

regressed by: bugzil.la/1742889
[1]: https://hg.mozilla.org/mozilla-central/diff/d85012b3aa3d67faba01f3f896a6ace6dbdbc37e/browser/actors/ClickHandlerParent.sys.mjs

extension/lib/utils.coffee

@@ -339,7 +339,11 @@ contentAreaClick = (data, browser) ->
   try if not PrivateBrowsingUtils.isWindowPrivate(window)
     PlacesUIUtils.markPageAsFollowedLink(data.href)
 
-  window.openLinkIn(data.href, window.whereToOpenLink(data), params)
+  where = try
+    window.BrowserUtils.whereToOpenLink(data)  # >=fx127
+  catch
+    window.whereToOpenLink(data) # <=fx126
+  window.openLinkIn(data.href, where, params)
 
 simulateMouseEvents = (element, sequence, browserOffset) ->
   window = element.ownerGlobal