Method is_unstable

rust/src/lib.rs:832–838

(&self, browser_version: &str)

    }

    fn is_unstable(&self, browser_version: &str) -> bool {
        browser_version.eq_ignore_ascii_case(BETA)
            || browser_version.eq_ignore_ascii_case(DEV)
            || browser_version.eq_ignore_ascii_case(NIGHTLY)
            || browser_version.eq_ignore_ascii_case(CANARY)
            || browser_version.eq_ignore_ascii_case(ESR)
    }

    fn is_browser_version_unstable(&self) -> bool {
        self.is_unstable(self.get_browser_version())