# Cesium runs slower on Firefox than on Chrome？ **URL:** \ **Category:** CesiumJS\ **Created:** [September 19, 2017, 7:35am UTC](https://community.cesium.com/t/cesium-runs-slower-on-firefox-than-on-chrome/6059 "2017-09-19T07:35:32Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![chaomaxd](https://avatars.discourse-cdn.com/v4/letter/c/e0b2c6/32.png) [@chaomaxd](https://community.cesium.com/u/chaomaxd)\ **Post date:** [September 19, 2017, 7:35am UTC](https://community.cesium.com/t/cesium-runs-slower-on-firefox-than-on-chrome/6059/1 "2017-09-19T07:35:32Z")
I found Cesium running relatively slowly on Firefox， compared with Chrome . Does anyone else notice the problem? or has any optimization plan ? ---
**Author:** ![pinkyamh](https://avatars.discourse-cdn.com/v4/letter/p/74df32/32.png) [@pinkyamh](https://community.cesium.com/u/pinkyamh)\ **Post date:** [September 19, 2017, 7:54am UTC](https://community.cesium.com/t/cesium-runs-slower-on-firefox-than-on-chrome/6059/2 "2017-09-19T07:54:21Z")
I have the same issue too ---
**Author:** ![Gabby\_Getz](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/gabby_getz/32/7838_2.png) [@Gabby\_Getz](https://community.cesium.com/u/Gabby_Getz)\ **Post date:** [September 20, 2017, 8:09pm UTC](https://community.cesium.com/t/cesium-runs-slower-on-firefox-than-on-chrome/6059/3 "2017-09-20T20:09:13Z")
Hi there, Is this Cesium specific, or WebGL in general? This may have something to do with your video card, see [this thread](https://groups.google.com/forum/#!searchin/cesium-dev/firefox%7Csort:relevance/cesium-dev/MSCG0L_07mw/iDuHc9AwAgAJ). We don’t have a specific optimization plan for Firefox, but if you could provide some additional details of when you notice the performance decrease decrease, I can open an issue. We have a some [Firefox specific issues open in github](https://github.com/AnalyticalGraphicsInc/cesium/issues?utf8=%E2%9C%93&q=is%3Aissue%20is%3Aopen%20firefox) if any of those help. Thanks, Gabby