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Firefox crashes

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Running win 8.1 on Surface Pro 3 and most current Firefox and Adobe flash plug-in. It has now become slow as the Adobe flash plugin crashes on almost every page and often followed by Firefox crashing. I have followed the suggestions for troubleshooting including reinstalling Adobe flash and reinstalling Firefox to the most current versions. Adobe flash plug-in works on Chrome without issue. Would very much appreciate receiving some assistance in solving this problem. Thanks.

Running win 8.1 on Surface Pro 3 and most current Firefox and Adobe flash plug-in. It has now become slow as the Adobe flash plugin crashes on almost every page and often followed by Firefox crashing. I have followed the suggestions for troubleshooting including reinstalling Adobe flash and reinstalling Firefox to the most current versions. Adobe flash plug-in works on Chrome without issue. Would very much appreciate receiving some assistance in solving this problem. Thanks.

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You can check for problems with current Shockwave Flash plugin versions and try this:

See also:

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To elaborate on the protected mode point: this feature of the Flash player plugin has security benefits, but seems to have compatibility issues on some systems. Particularly if you are experiencing unresponsive or slow script error dialogs, or excessive Flash processes, this would be a prime suspect.

There is a hidden setting for disabling protected mode:

(A) In a new tab, type or paste about:config in the address bar and press Enter. Click the button promising to be careful.

(B) In the search box above the list, type or paste flash and pause while the list is filtered

(C) Double-click the dom.ipc.plugins.flash.disable-protected-mode preference to switch its value from false to true.

This might not take effect until all Flash has been unloaded for a few minutes, or you close Firefox.