Bug 398174: add DM 'addToRecentDocs' pref to firefox.js, and add a comment explaining it's use, r+a=mconnor

browser/app/profile/firefox.js

@@ -215,6 +215,7 @@ pref("browser.download.manager.openDelay", 0);
 pref("browser.download.manager.focusWhenStarting", false);
 pref("browser.download.manager.flashCount", 2);
 pref("browser.download.manager.displayedHistoryDays", 7);
+pref("browser.download.manager.addToRecentDocs", true);
 
 // search engines URL
 pref("browser.search.searchEnginesURL",      "https://%LOCALE%.add-ons.mozilla.com/%LOCALE%/firefox/%VERSION%/search-engines/");

toolkit/components/downloads/src/nsDownloadManager.cpp

@@ -1610,6 +1610,8 @@ nsDownload::SetState(DownloadState aState)
         }
       }
 #ifdef XP_WIN
+      // Default is to add the download to the system's "recent documents"
+      // list, with a pref to disable.
       PRBool addToRecentDocs = PR_TRUE;
       if (pref)
         pref->GetBoolPref(PREF_BDM_ADDTORECENTDOCS, &addToRecentDocs);