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Flash-related freezes on Firefox 30 (worked on 29) on Mac OS X 10.9 Mavericks

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Since I updated to Firefox 30, any flash makes Firefox freeze (I have to force kill it).

- HTML5 video works - Disabling hardware acceleration did not help. - Uninstalling/reinstalling the latest version of Flash did not help. - Safe-mode (addons disabled) did not help.

I don't have any crash reports, as this is not a crash, but rather a freeze.

What can I do short of reinstalling the old version of Firefox (very annoying, would lose addons and config) or switching to another browser?

Since I updated to Firefox 30, any flash makes Firefox freeze (I have to force kill it). - HTML5 video works - Disabling hardware acceleration did not help. - Uninstalling/reinstalling the latest version of Flash did not help. - Safe-mode (addons disabled) did not help. I don't have any crash reports, as this is not a crash, but rather a freeze. What can I do short of reinstalling the old version of Firefox (very annoying, would lose addons and config) or switching to another browser?

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As it turns out, rebooting solved the problem. Should have tried that before. Rebooting is always the answer. I did also update to 10.9.4 in the process, so that may have had an impact, although I suspect not.