This is almost done but missing a few things such as preference (so the it does nothing in this release). This version is a lot more stable than 0.5.0a. Fixed a bunch of issues but I need to test more and implement a few more things before final release and try to upload to Firefox addons.

Added in this version:

• Transparency fully works now (may have edge cases but most should work), images that are png but are not transparent may change to jpg extension to upscale the image.
• Cleaned up code

Issues:

• Download multiple images at once will only actually process the last image (recommended to download images with at least a 4-6 sec delay in between)
• Unable to cancel/remove downloads (upon request)

People can start filing bugs if they wish now.