Bandwidth Hero is an open-source browser extension which saves data by compressing images on the page via data compresion service. It reduces image size by about 50%-75%.
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More... just install do not think anymoreTLDR; 🤔 has used this product for one day.
Easy to use, open sourceCons:
Can be used with my own server (easily installable on heroku if needed).Lili has used this product for one month.