My PC is used by me and another person and we use vastly different zoom levels. My partner uses about 0.75 and I use 1.25 in Chrome and would like to set similar zoom levels in Firefox. As I use the PC most and I want the default zoom level to be 1.25. I would like to replace the FF level of 1.2 with 1.25 and delete some of the lower zoom levels. A setting of 0.33, 0,5, 0.75., 1.00 and 1.25 to replace the settings up to and including 1.33 would be my desire. I wish to leave the higher zoom levels unchanged. ''duplicated. see https://support.mozilla.org/en-US/questions/1277726'' I understand I can change this in about:config but would like some assistance in doing this.