Michael, Purify is reporting major leaks when bringing up the viewer with the about:blank URL and then quiting. [W] MLK: Memory leak of 80 bytes from 1 block allocated in nsGfxFactoryWin::CreateInstance(nsISupports *,nsID const&,void * *) [W] MLK: Memory leak of 256 bytes from 1 block allocated in DeviceContextImpl::DeviceContextImpl(void) [W] MLK: Memory leak of 24 bytes from 1 block allocated in NS_NewFontCache [W] MLK: Memory leak of 48 bytes from 1 block allocated in nsFontMetricsWin::new(UINT) [W] MLK: Memory leak of 28 bytes from 1 block allocated in nsFontMetricsWin::Init(nsFont const&,nsIDeviceContext *) [W] MLK: Memory leak of 34 bytes from 1 block allocated in nsString::EnsureCapacityFor(int) [W] MLK: Memory leak of 4 bytes from 1 block allocated in DeviceContextImpl::CreateFontAliasTable(void) [W] MLK: Memory leak of 32 bytes from 1 block allocated in PR_Malloc [W] MLK: Memory leak of 1024 bytes from 1 block allocated in PR_Malloc [W] MLK: Memory leak of 16 bytes from 1 block allocated in nsString::ToNewString(void)const [W] MLK: Memory leak of 34 bytes from 1 block allocated in nsString::EnsureCapacityFor(int) [W] MLK: Memory leak of 84 bytes from 1 block allocated in StringKey::Clone(void)const [W] MLK: Memory leak of 32 bytes from 2 blocks allocated in PR_Malloc [W] MLK: Memory leak of 16 bytes from 1 block allocated in nsString::ToNewString(void)const [W] MLK: Memory leak of 34 bytes from 1 block allocated in nsString::EnsureCapacityFor(int) [W] MLK: Memory leak of 84 bytes from 1 block allocated in StringKey::Clone(void)const [W] MLK: Memory leak of 32 bytes from 2 blocks allocated in PR_Malloc [W] MLK: Memory leak of 32 bytes from 1 block allocated in nsVoidArray::InsertElementAt(void *,int) [W] MLK: Memory leak of 80 bytes from 1 block allocated in nsGfxFactoryWin::CreateInstance(nsISupports *,nsID const&,void * *) [W] MLK: Memory leak of 256 bytes from 1 block allocated in DeviceContextImpl::DeviceContextImpl(void) [W] MLK: Memory leak of 24 bytes from 1 block allocated in NS_NewFontCache [W] MLK: Memory leak of 48 bytes from 1 block allocated in nsFontMetricsWin::new(UINT) [W] MLK: Memory leak of 28 bytes from 1 block allocated in nsFontMetricsWin::Init(nsFont const&,nsIDeviceContext *) [W] MLK: Memory leak of 34 bytes from 1 block allocated in nsString::EnsureCapacityFor(int) [W] MLK: Memory leak of 4 bytes from 1 block allocated in DeviceContextImpl::CreateFontAliasTable(void) [W] MLK: Memory leak of 32 bytes from 1 block allocated in PR_Malloc [W] MLK: Memory leak of 1024 bytes from 1 block allocated in PR_Malloc [W] MLK: Memory leak of 16 bytes from 1 block allocated in nsString::ToNewString(void)const [W] MLK: Memory leak of 34 bytes from 1 block allocated in nsString::EnsureCapacityFor(int) [W] MLK: Memory leak of 84 bytes from 1 block allocated in StringKey::Clone(void)const [W] MLK: Memory leak of 16 bytes from 1 block allocated in nsString::ToNewString(void)const [W] MLK: Memory leak of 34 bytes from 1 block allocated in nsString::EnsureCapacityFor(int) [W] MLK: Memory leak of 84 bytes from 1 block allocated in StringKey::Clone(void)const [W] MLK: Memory leak of 32 bytes from 1 block allocated in nsVoidArray::InsertElementAt(void *,int) [W] MLK: Memory leak of 80 bytes from 1 block allocated in nsGfxFactoryWin::CreateInstance(nsISupports *,nsID const&,void * *) [W] MLK: Memory leak of 256 bytes from 1 block allocated in DeviceContextImpl::DeviceContextImpl(void) [W] MLK: Memory leak of 24 bytes from 1 block allocated in NS_NewFontCache [W] MLK: Memory leak of 48 bytes from 1 block allocated in nsFontMetricsWin::new(UINT) [W] MLK: Memory leak of 28 bytes from 1 block allocated in nsFontMetricsWin::Init(nsFont const&,nsIDeviceContext *) [W] MLK: Memory leak of 34 bytes from 1 block allocated in nsString::EnsureCapacityFor(int) [W] MLK: Memory leak of 4 bytes from 1 block allocated in DeviceContextImpl::CreateFontAliasTable(void) [W] MLK: Memory leak of 32 bytes from 1 block allocated in PR_Malloc [W] MLK: Memory leak of 1024 bytes from 1 block allocated in PR_Malloc [W] MLK: Memory leak of 16 bytes from 1 block allocated in nsString::ToNewString(void)const [W] MLK: Memory leak of 34 bytes from 1 block allocated in nsString::EnsureCapacityFor(int) [W] MLK: Memory leak of 84 bytes from 1 block allocated in StringKey::Clone(void)const [W] MLK: Memory leak of 32 bytes from 2 blocks allocated in PR_Malloc [W] MLK: Memory leak of 16 bytes from 1 block allocated in nsString::ToNewString(void)const [W] MLK: Memory leak of 34 bytes from 1 block allocated in nsString::EnsureCapacityFor(int) [W] MLK: Memory leak of 84 bytes from 1 block allocated in StringKey::Clone(void)const [W] MLK: Memory leak of 32 bytes from 2 blocks allocated in PR_Malloc [W] MLK: Memory leak of 32 bytes from 1 block allocated in nsVoidArray::InsertElementAt(void *,int) [I] MPK: Potential memory leak of 136 bytes from 1 block allocated in nsWidgetFactory::CreateInstance(nsISupports *,nsID const&,void * *) [W] MLK: Memory leak of 80 bytes from 1 block allocated in nsGfxFactoryWin::CreateInstance(nsISupports *,nsID const&,void * *) [W] MLK: Memory leak of 256 bytes from 1 block allocated in DeviceContextImpl::DeviceContextImpl(void) [W] MLK: Memory leak of 24 bytes from 1 block allocated in NS_NewFontCache [W] MLK: Memory leak of 48 bytes from 1 block allocated in nsFontMetricsWin::new(UINT) [W] MLK: Memory leak of 28 bytes from 1 block allocated in nsFontMetricsWin::Init(nsFont const&,nsIDeviceContext *) [W] MLK: Memory leak of 34 bytes from 1 block allocated in nsString::EnsureCapacityFor(int) [W] MLK: Memory leak of 4 bytes from 1 block allocated in DeviceContextImpl::CreateFontAliasTable(void) [W] MLK: Memory leak of 32 bytes from 1 block allocated in PR_Malloc [W] MLK: Memory leak of 1024 bytes from 1 block allocated in PR_Malloc [W] MLK: Memory leak of 16 bytes from 1 block allocated in nsString::ToNewString(void)const [W] MLK: Memory leak of 34 bytes from 1 block allocated in nsString::EnsureCapacityFor(int) [W] MLK: Memory leak of 84 bytes from 1 block allocated in StringKey::Clone(void)const [W] MLK: Memory leak of 16 bytes from 1 block allocated in nsString::ToNewString(void)const [W] MLK: Memory leak of 34 bytes from 1 block allocated in nsString::EnsureCapacityFor(int) [W] MLK: Memory leak of 84 bytes from 1 block allocated in StringKey::Clone(void)const [W] MLK: Memory leak of 32 bytes from 1 block allocated in nsVoidArray::InsertElementAt(void *,int)

reworked fontcache and metrics ownership.

Troy provide a test case for verification

installing myself as QA Contact en masse

marking verified per reporter