I am frequently needing to clear the Cached web content, when doing development work on a website. I always need to remember to remove the check mark from the Cookies box. However, I sometimes forget and loose dozens of log-in cookies and need to reset them, which is a big pain.

I was unable to find anything in the Firefox Advance Configuration settings. In Chromium and Chrome browsers, only the Cached images and files box is set with a check mark. If I cannot change the default for Cookies, this is reason enough for me to switch browsers, despite using Firefox for many years.