I ran a long-running test that was navigating to a restricted set of web pages for a whole day. The browser process was kept alive the whole time. Memory dumps using memory-infra are taken at the beginning and at the end of the experiment.

The following stackframe are remaining objects allocated between start/end.
They are potential leak or cache or data-structure growing.

6622 objects

      "malloc",
      "operator new",
      "std::_Allocate",
      "std::_Tree_comp_alloc<std::_Tmap_traits<int,std::pair<int,int>,std::less<int>,std::allocator<std::pair<int const ,std::pair<int,int> > >,0> >::_Buynode<std::piecewise_construct_t const & __ptr64,std::tuple<int const & __ptr64>,std::tuple<> >",
      "std::map<int,std::pair<int,int>,std::less<int>,std::allocator<std::pair<int const ,std::pair<int,int> > > >::_Try_emplace<int const & __ptr64>",
      "ui::AXTreeIDRegistry::GetOrCreateAXTreeID",
      "content::WebContentsImpl::RenderViewReady",
      "base::internal::Invoker<base::internal::BindState<void (__cdecl media::MojoAudioOutputStream::*)(void) __ptr64,base::WeakPtr<media::MojoAudioOutputStream> >,void __cdecl(void)>::Run",
      "content::`anonymous namespace'::RenderProcessHostIsReadyObserver::CallTask",
      "base::internal::Invoker<base::internal::BindState<void (__cdecl ProfileDestroyer::*)(void) __ptr64,base::WeakPtr<ProfileDestroyer> >,void __cdecl(void)>::RunOnce",
      "base::debug::TaskAnnotator::RunTask",
      "base::MessageLoop::RunTask",
      "base::MessageLoop::DoWork",
      "base::MessagePumpForUI::DoRunLoop",
      "base::MessagePumpWin::Run",
      "base::RunLoop::Run",
      "ChromeBrowserMainParts::MainMessageLoopRun",
      "content::BrowserMainLoop::RunMainMessageLoopParts",
      "content::BrowserMainRunnerImpl::Run",
      "content::BrowserMain",
      "content::RunNamedProcessTypeMain",
      "content::ContentMainRunnerImpl::Run",
      "service_manager::Main",
      "content::ContentMain",
      "ChromeMain",
      "MainDllLoader::Launch",
      "wWinMain",
      "__scrt_common_main_seh",
      "BaseThreadInitThunk",
      "RtlUserThreadStart",
      "[Thread: CrBrowserMain]"




      "operator new",
      "std::_Allocate",
      "std::_Tree_comp_alloc<std::_Tmap_traits<guest_view::GuestViewManager::ElementInstanceKey,int,std::less<guest_view::GuestViewManager::ElementInstanceKey>,std::allocator<std::pair<guest_view::GuestViewManager::ElementInstanceKey const ,int> >,0> >::_Buynode<std::piecewise_construct_t const & __ptr64,std::tuple<guest_view::GuestViewManager::ElementInstanceKey const & __ptr64>,std::tuple<> >",
      "std::map<std::pair<int,int>,int,std::less<std::pair<int,int> >,std::allocator<std::pair<std::pair<int,int> const ,int> > >::_Try_emplace<std::pair<int,int> const & __ptr64>",
      "ui::AXTreeIDRegistry::GetOrCreateAXTreeID",
      "content::WebContentsImpl::RenderViewReady",
      "base::internal::Invoker<base::internal::BindState<void (__cdecl media::MojoAudioOutputStream::*)(void) __ptr64,base::WeakPtr<media::MojoAudioOutputStream> >,void __cdecl(void)>::Run",
      "content::`anonymous namespace'::RenderProcessHostIsReadyObserver::CallTask",
      "base::internal::Invoker<base::internal::BindState<void (__cdecl ProfileDestroyer::*)(void) __ptr64,base::WeakPtr<ProfileDestroyer> >,void __cdecl(void)>::RunOnce",
      "base::debug::TaskAnnotator::RunTask",
      "base::MessageLoop::RunTask",
      "base::MessageLoop::DoWork",
      "base::MessagePumpForUI::DoRunLoop",
      "base::MessagePumpWin::Run",
      "base::RunLoop::Run",
      "ChromeBrowserMainParts::MainMessageLoopRun",
      "content::BrowserMainLoop::RunMainMessageLoopParts",
      "content::BrowserMainRunnerImpl::Run",
      "content::BrowserMain",
      "content::RunNamedProcessTypeMain",
      "content::ContentMainRunnerImpl::Run",
      "service_manager::Main",
      "content::ContentMain",
      "ChromeMain",
      "MainDllLoader::Launch",
      "wWinMain",
      "__scrt_common_main_seh",
      "BaseThreadInitThunk",
      "RtlUserThreadStart",
      "[Thread: CrBrowserMain]"