FF 56.0 not remembering Startup option - Files to exclude in CC?

Win 10 (64bit)

CCleaner 5.35.6210 (64bit)

I installed FF 56.0 (64bit) last night on 2 different computers and made sure options were all correct.

FF: Tools / Options / General, When FF Starts: Show your home page (which is start.DuckDuckGo)

I browsed today and closed FF. Opened CC and Run Cleaner.

CC Firefox checked:

Internet cache

Internet History

Cookies

Download History

Last downloaded Location

Session

When I opened FF it did not open to start page, instead it tried to open my previous tabs. I re-checked FF options and all were set correctly. I re-browsed to some sites in several tabs and closed FF and again ran CCleaner. Same results - tried to open old tabs.

I repeated the process again, closed FF and did NOT run CC. Opened FF and it started correctly.

Conclusion: CC is deleting a new file in this version of FF 56.0 and I do not know what it is or how to troubleshoot.

thanks for any help!

Bob

Try turning off session in ccleaner's firefox section

Thanks @Nergal, that seems to have worked!

Win 10 (64bit)

CCleaner 3.35.6210 (64bit)

Did you mean CCleaner 5.35 instead?

.@Andavari - yes. I edited post to reflect correction. Thanks!