Crash signature - nsStyleSet FileRules

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The template "crashsig" does not exist or has no approved revision. nsStyleSet::FileRules(int (*)(nsIStyleRuleProcessor*, void*), RuleProcessorData*), nsStyleSet::FileRules(int (*)(nsIStyleRuleProcessor*, void*), RuleProcessorData*, nsRuleWalker*)

This type of crash is often caused by:

For troubleshooting other types of Firefox crashes, see Firefox crashes - Troubleshoot, prevent and get help fixing crashes.

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