From the now-closed bug 46200: ------- Comment #102 From Nickolay_Ponomarev 2009-07-18 12:09:10 PDT So... http://mxr.mozilla.org/mozilla-central/search?string=nsibrowserinstance and http://mxr.mozilla.org/mozilla-central/search?string=component/browser/instance only list the interface/component used in (Firefox's) browser.js In browser.js the component is created only once and stored in a global variable appCore. http://mxr.mozilla.org/mozilla-central/search?string=appCore shows this variable is only used in browser.js: # line 924 -- appCore.startPageCycler(); -- #ifdef'ed ENABLE_PAGE_CYCLER -- I don't see this being defined anywhere. Plus anyway nsBrowserInstance::StartPageCycler is a no-op. # line 1107 -- appCore = Components.classes["@mozilla.org/appshell/component/browser/instance;1"] # line 1145 -- appCore.setWebShellWindow(window); -- startup initialization. The component stores references to the chrome |window| and the content window, but doesn't appear to do anything else useful. Also has some debug code, which doesn't appear useful. # line 1433 -- if (appCore) # line 1434 -- appCore.close(); -- on shutdown. Doesn't do anything useful (sets a flag, which doesn't seem to affect anything). Looks like it can be killed. Anything I missed? ------ It should be possible to remove the component and the interface both from Firefox and mozilla-central, but removing it from Firefox requires packaging changes which tend to cause pain and suffering, and removing it from mozilla-central requires fixing up comm-central, which still uses the component. Removing references to the component from browser.js is easy though, so let's do it first.

Comment on attachment 397453 [details] [diff] [review] remove nsIBrowserInstance usage from browser.js Might even be a nice Ts win!

Comment on attachment 397453 [details] [diff] [review] remove nsIBrowserInstance usage from browser.js a192=beltzner (did it turn out to be a Ts win? if so, can someone whiteboard this with [ts]?)