Why Firefox Rapid Release Schedule Is a Bad Idea

Why Firefox Rapid Release Schedule Is a Bad Idea
Mozilla has committed to an aggressive 18-week cycle for pushing major Firefox releases, but businesses won’t adopt new software that quickly.
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is it good idea to sign a contract which has a penalty clause for not meeting zero critical defects goal?

I work in the software field as a vendor prviding software solutions to client. After investing in several months of development and testing effort for a project, they are insisting that just before go-live deploy decision is made, they will do dry run and do final verification. if still there are any critical defects found [...]