Let me explain the problem.
You have just taken 50 photos for an Instructable that you're going to document. Now you want to upload, probably all of them, so you can start attaching them to each step you're going to create. You want to upload them all at once, because it's too slow to upload them on each step and it breaks your writing rythym. You probably also wish you could just drag images from your desktop or folders instead of choosing each one at a time.
We have one, so follow me to Step 1.
Step 1: Install Firefox plugin dragdropupload
Now download and install dragdropupload:
If you have an older version of FF, 1.5.x or older, you'll need to restart your browser. If you have the latest version, it will ask you to restart and it will reload all the pages you're currently browsing.
Step 2: Go to Contribute > Upload Files
In the navigation menu at the top of the page, go to:
---> Upload Images
Then open your desktop finder and browse to the images you want to select.
Assuming you have arranged the windows, so you can see them both at the same time, like the image below. Drag your images onto the textbox right after the word choose.
You should then see all the images you selected listed. See the second image below.