Improve pixiv thumbnails
Stop pixiv from cropping thumbnails to a square. Use higher resolution thumbnails on Retina displays.
I understand English and simple Japanese, please help translate :)
Example

曙と雨 by ナユヒ
Preferences
User preferences can be configured by setting items in the web browser's LocalStorage. To set preferences, go to www.pixiv.net
and open the Web Inspector (usually Ctrl-Shift-I
). Type in one of these statements in the Javascript console at the bottom:
To add a preference:
localStorage.setItem('Preference name', 'value')
To remove a preference:
localStorage.removeItem('Preference name')
Allow custom thumbnails
Preference name: kepstinAllowCustom
Pixiv allows artists to set custom square crops for thumbnails when they upload the image. If you would like to use custom cropped thumbnails, set the value to true
Override image CDN domain
Preference name: kepstinOverrideDomain
By default, images will be loaded from the domain name provided by pixiv. However, you can choose a different CDN to use by setting the value of this preference to a different domain name. This may improve image load speeds overseas. See the list of domain names for more information.