None of the CVE's listed affect the current version of Firefox.
Many of the vulnerabilities fixed are discovered by Mozilla's security team as well as community members, so while there may have been a vulnerability in the browser and it was fixed, it does not mean the vulnerability was known or used maliciously previous to being disclosed.
This is why you cannot judge the security of a product based upon the number of CVE's published. If the vendor in question has an open security program they will publicly disclose all security vulnerabilities they discovered internally. This is a common practice will most (all?) of the major browser vendors.
For example, look at the history of Google Chrome CVE's. You will notice huge spikes in the number of vulnerabilities. A little research, and you will find that was when the Chrome Security team started heavily fuzzing their code and fixing vulnerabilities before most of them were discovered by outside parties.
What you have to worry more about is vendors who don't publicly disclose security vulnerability information, so the only CVE's you see are the ones that independent parties published.