zotero loading time
When you have big reference libraries, that is the case with meta-analysis studies, the time Zotero takes to load approximately more than 2000 references can make firefox freeze for a too long time, and that delay increases with the number of references/citations in your library.
It would be better to have Zotero operational before it finishes loading all items in the citation list, because that can still be done when you click on the collection.
It would be better to have Zotero operational before it finishes loading all items in the citation list, because that can still be done when you click on the collection.
But this thread was about the first load of Zotero after a Firefox restart, so start a new thread if it's another issue and provide a Debug ID for the action in question. Also tell us how many items you have, including attachments.