Web developer charging €380 for a security header plugin

Hi,

I have a shop and a webshop. My web developer just send me an email (to all their customers) about safety concerns etc.
They are offering me a plugin for 380 euros that will secure these things;

X-Content-Type-Options
X-XSS-Protection
X-Frame-Options
Certificate Transparency
No Referrer When Downgrade header
Content Security Policy
Upgrade Insecure requests

Is that really necessary? I would say it’s not. And or really expensive.

Also I’m thinking about a new website, with a different builder… also something to keep in mind.

 

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