Ultra compression algorithm destroys any traces of quality...is another google emanation...is not a copy of an image not even a preview or thumb is just a luke-like representation of the original image...destroys color profile and outlines look horrible... avoid this if you have respect for quality.
No browsers support native decoding of this format yet. It should be noted though, that there's a JavaScript implementation of the decoder which can execute and decode BPG files.
BPG is able to produce the same image quality as JPEG but at half the size. This is simply because is uses a newer codec, x265 which is the open-source implementation of HEVC/H.265.
BPG is an open source implementation which only took a few months to be created. It is not created by some international standardization body (like ITU or ISO), which take several years to create and update standards.
Since it's open source, changes can be proposed at any time, and if they benefit the project, they are merged into the main branch. This ensures that the standard is always up to date and that fixes can come quickly.