Sorry, do you remember which FAQ it was that you read? Could you provide a link to it?

Cookies generally are for your convenience in having websites remember you and your preferences. If you flushed your cookies every day, usually the worst thing that would happen is that you would always need to log in to sites, and if the site saves your preferences in a cookie, you would get the standard default settings on the site rather than any custom settings you saved.

There are some cookies that are a pain to re-create. For example, online banking sites often require you to enter a code you received through a text message or fulfill some other challenge. If you don't keep that cookie, you have to complete the extra step every time.

Flash LSOs may be used for similar purposes, and more. Some sites may use them for data like your place in a game.

I guess what I'm saying is, there's no way for us to know what is in your personal cookies and how important it might be to you. We could only provide general guidance on what offers the best site compatibility (keep the cookies) versus the best privacy (dump the cookies), and maybe a good balance for preserving your sanity.

Maybe you should reconsider to use such specialized extensions if you are not that knowledgeable enough to fully understand how they work and how to configure them properly.
Things about how cookies work on websites can change at any time, especially with large sites that use more than one domain for load balancing or otherwise (cdn).

to Jscher2000. The FAQs were at the bottom of the BetterPrivacy info at https://addons.mozilla.org/en-US/firefox/addon/betterprivacy/ Thank you for your info.

the FAQs were at the bottom of the info page of https://addons.mozilla.org/en-US/firefox/addon/betterprivacy/

Thank you for your help.

Oh I see, the FAQs are in the Developer Comments section.

Q: How to exclude certain LSOs from automatic deletion?

A: Go to BetterPrivacy's options (Firefox tools menu), LSO-manager tab, select the site/cookie folder you want to exclude and press 'Prevent automatic LSO deletion'. Note that you allow tracking with every excluded LSO. Important: Protection means those LSO's are excluded from BetterPrivacy's deletion but the owner web site still can delete them as well as any other programs you might have running!

I think in order to learn which sites have important LSOs you need to discover it through something annoying happening on the site after they're cleared. I suspect there's no way to know in advance that a site saves anything valuable that way.

Thank you.