# Echo360 super speed userscript > _Note that this project is not endorsed by or affiliated with Echo360_ ### [Install userscript](https://github.com/peter-tanner/Echo360-Super-Speed/raw/master/echo360-super-speed.user.js) ### [Mirror (Greasyfork)](https://greasyfork.org/en/scripts/501694-echo360-super-speed) Adds faster speed options (4x, 3x) to Echo360 player and allows the user to add their own speed options. NOTE: Only works on Firefox! ## Adding your own speeds Open the userscript file, then modify the `selected_speeds` and/or `speed_hotkey_increment` constants which are in the `USER CUSTOMIZATION` section. For example, if I wanted only 4x, 3x and 2x options, I can replace the `selected_speeds` constant with the following: ```js const selected_speeds = [4, 3, 2]; ``` ⚠ Note that there is a browser set limit of 16x, and speeds above 4x are muted, according to [these constants in the firefox source code](https://searchfox.org/mozilla-central/rev/f1c881ba5603410dacbe52874053af38bd825c3b/dom/html/HTMLMediaElement.cpp#179-183) ## Current issues - When setting `selected_speeds` to a list of speeds which does not include 1x, the player by default loads with 1x speed when the page is loaded. Once the speed is changed manually by clicking on a speed from the dropdown this is not an issue anymore, but it would be nice if the default speed was valid.