A couple of lines of code that runs in any modern web browser by default may crash Apple's Safari web browser, iPhones and affects select browsers as well.
TEST (WARNING: This is designed to crash certain browsers!):
Result: Pale Moon v28.0.1 is unaffected!
The developer promises code to crash or freeze Firefox in the coming week.
TEST (WARNING: This is designed to freeze certain browsers):
Result: Pale Moon v28.0.1 freezes!
It is up to the browser's developers to fix the issue.
While it does lead to freezes or crashes only, it may lead to data loss due to that.