I just updated my ‘UpShare MB’ shortcut to version 1.1:

• Added an option to set a persistent upload destination in case you have multiple sites with Micro.blog. Just add your Micro.blog subdomain (i.e. https://jarrod.micro.blog) in the ‘Setup Stuff’ to always upload to a particular site. If left blank, it will default to uploading to the last site you used on Micro.blog.
• General spit and polish

Get it from the HeyDingus Shortcuts Library.