SRX 5308 firmware update

I'm actually using an SRX 5308 router, which is tagged as EoL product. As there is no replacement for this router in Netgear catalog, I was wondering if a minimal firmware update implmenting TLS 1.2 (which is the minimum request for modern browsers) would be possible. So we could continue using the router and, first of all, connecting to managmenet interface via browser.

Thanks in advance

Luciano