Unfortunately, as long as Firefox security infrastructure does not match Chrome, I can not use it. Note that errors like use-after-free and buffer overflows are marked as Critical (run arbitrary code on computer) for Firefox, but marked as High (execute code in the context of, or otherwise impersonate other origins.) for Chrome because of sandboxing.
Firefox: https://www.mozilla.org/en-US/security/known-vulnerabilities...
Chrome: https://chromereleases.googleblog.com/search/label/Stable%20...
Hopefully with their sandboxing project done (Also with Rust) will make Firefox much better in the security department, but until then, no.