Facebook has been automatically adding alt tags to images you upload that are populated with keywords representing the content of your images. This project is a hack to block all the images which contains 'text' or 'meme' in alt tag, which generally covers most of the memes.
To reduce the aggressiveness, change line 29 in facebook.js to tag == 'meme'.
To install in Firefox go to about:debugging and upload facebook.js. In Chrome, go to extensions and enable Developer Mode, in 'Load unpacked extension' upload the repo folder.