有关HSTS的内容

Firefox 清除 HSTS 信息 [引自:https://security.stackexchange.com/questions/102279/can-hsts-be-disabled-in-firefox]:

  1. Type about:support in firefox
  2. Click Profile Folder | Open Folder which should open your profile folder.
  3. Find file called SiteSecurityServiceState.txt and open it
  4. Find the entry for your site url and remove it. Entry would looks something like – github.com:HSTS 120 17242 1521194647604,1,1
  5. Make sure for above firefox is closed so that it does not overwrite it.

命令行查看证书信息:
openssl s_client -connect host:443 -showcerts