Can I view an uploaded invoice on my suppliers bills page?

Thank you for posting here in the Community, @rowan3.

I'll share some information about the issue of redownloading bills instead of opening them.

I recommend checking your browser settings and ensuring you have a plugin for the PDF reader. Once set, you should be able to view the bills when you click on them.

You can also check how to manage your uploaded bills and receipts in QuickBooks Online to save time tracking and recording your receipts and bills from suppliers.

You can then review, add, or match receipts and bills.

Feel free to add comments below if you have questions about your bills in QuickBooks Online. Have a great day.

Something's been changed, all new pdf attachments behave this way now whilst older attachments still open in a separate tab to view rather than download

It's a PITA for want of a better phrase

As for browser plugins, Chrome doesn't let you determine the default pdf viewer any longer so that suggested solution doesn't seem to work either, for Chrome at least