Firefox has no issues keeping web pages open.
Google-chrome does. Lots's of "It's dead Jim" errors.
The embeded Flash Player has issues too. Error #1009. Usually when playing DRM stuff or mousing around a lot when commercials appear such as wen watching videos here: http://www.cbs.com/shows/under-the-dome/ and elsewhere. Weh wtching CBS, googlee-chrome just hangs and always during a commercial and mostly when I'm switching windows while the commercial is playing. The #1009 error is on another website where Flas on Windows doesnt work well either. Adobe is aware of the problem with Windows, but can't seem to put a handle on it. I had better luck in windows when I disabled the container tht Flash Runs in when in Firefox.