We just pushed out a new version of the F1 add-on and the F1 service. Existing users should upgrade their add-ons (click on “Find Updates” in the Add-On manager). In this release we:

• Made it faster. The UI loads and opens faster, and sharing itself is faster.
• Emails sent by F1 now have both HTML and plaintext parts. In both cases we include the link by default so you have more room to type your message.
• The share button can be moved to any location in the toolbar
• Various bug fixes including better support for messages with non-English characters, spell-checking works, and more.