Firefox Community Forum

After a recent update, I noticed that my toolbar changed suddenly. I was able to rebuild it how I like and most of it stays, however, the "Open A New Tab" button refuses to stay where I want it.

Whenever I open a new window of Firefox, the "Open A New Tab" button is found on the leftmost side of my screen beside the new tabs. If I go to the "Customize Toolbar" page, I am able to move it so it stays to the right of the rightmost tab, which is where I want it to be.

Anytime I open a new window, whether it's through dragging a tab onto another monitor, or opening Firefox the first time after turning on my computer, my change gets reversed.

How can I permanently move this button to the desired position?

This did not become an issue until an update about a week or so ago.

In firefox developer edition, when opening a new window of any kind, or when relaunching/opening the app, the new tab button always ends up on the left hand side. Going to the customization menu, I can move the button to the right side (next to the last tab), which is where I prefer it, however when opening any new window the button goes back to the left side

After finding out Firefox was storing over a gigabyte of cookies, I figured it might be wise to set it up to clear them except for sites I used regularly. However, I've recently noticed that Youtube will clear regardless. I've tried entering the domain both as youtube.com as well as www.youtube.com, but my video display preferences aren't retained. This doesn't happen for other sites, like Reddit or Tumblr. What do I need to enter in the exception list to keep my settings?