In chrome, the "Tab Count" extension gives you a quick way to find the answer. https://chrome.google.com/webstore/detail/tab-count/cfokcacdaonnckdmopmcgeanhkeb

In chrome, the "Tab Count" extension gives you a quick way to find the answer. https://chrome.google.com/webstore/detail/tab-count/cfokcacdaonnckdmopmcgeanhkebeaio https://chrome.google.com/webstore/detail/tab-count/cfokcacd... In my case, 82. When the favicons start to disappear I open another window.