If it's using the IonMonkey JIT for Javascript, which I think is likely, then yes. More detail:
According to the project docs, "SeaMonkey 2.49.5 uses the same backend as Firefox and contains the relevant Firefox 52.9.0 ESR security fixes." The current, fixed, version is 68.4.1. So it depends on whether 52.9.0 includes IonMonkey. It does according to SpiderMonkey - Wikipedia. SeaMonkey 2.49.5 appears to have come out in October. According to SeaMonkey:Home Page - MozillaWiki it's receiving security updates, so maybe it will get updated. Or you could live dangerously and pick up one of the development builds.
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Date: 2020-01-11 12:23 am (UTC)According to the project docs, "SeaMonkey 2.49.5 uses the same backend as Firefox and contains the relevant Firefox 52.9.0 ESR security fixes." The current, fixed, version is 68.4.1. So it depends on whether 52.9.0 includes IonMonkey. It does according to SpiderMonkey - Wikipedia.
SeaMonkey 2.49.5 appears to have come out in October. According to SeaMonkey:Home Page - MozillaWiki it's receiving security updates, so maybe it will get updated. Or you could live dangerously and pick up one of the development builds.