Yours is one of 3 posts in the last 10 minutes on this issue. It could be the site. I'll take a look.

Could you check your pop-up setting for google.com? Here's how:

While you have the compose window on the screen, click the padlock in the address bar.

• If the pop-up permission is listed there as Block, try changing it to Allow.

• If the pop-up permission is not listed there, click More Information to launch the Page Info dialog, then click Permissions in the top bar. Scroll down to "Open pop-up windows", uncheck the box for "Set default" then click Allow and close the dialog.

Then try the paper clip again. Success?

Unfortunately, that is "Google-wide" and not limited to mail, so... other pop-ups are possible that you've never noticed before.

Thank you so much for your help jscher2000! It seems the issue was resolved on it's own. Don't know if it was a google or firefox issue but I can attach files again today. I'll keep your suggestion in mind should this occur in the future. Thanks again for the replies. :)

Hi Ex - I noticed you'd had the same problem as me, and that yours too was magically fixed today - leading me to believe it was something Mozilla tweaked today.

got posted twice... /sigh

Google has fixed this issue on their side, so you should no longer experience this.

• https://productforums.google.com/forum/#!topic/gmail/q0BxcGOa6pk