# Firefox largely hangs on web UI when viewing a running build **URL:** \ **Category:** Bug Reports\ **Tags:** ui\ **Created:** [October 31, 2016, 6:41pm UTC](https://discuss.circleci.com/t/firefox-largely-hangs-on-web-ui-when-viewing-a-running-build/7779 "2016-10-31T18:41:53Z")\ **Posts on this page:** 12\ **Page:** 1
**Author:** ![CJBridges](https://sea2.discourse-cdn.com/circleci/user_avatar/discuss.circleci.com/cjbridges/32/8740_2.png) [@CJBridges](https://discuss.circleci.com/u/CJBridges)\ **Post date:** [October 31, 2016, 6:41pm UTC](https://discuss.circleci.com/t/firefox-largely-hangs-on-web-ui-when-viewing-a-running-build/7779/1 "2016-10-31T18:41:53Z")
Firefox 49.0.2 Build is running on an Ubuntu container (both 12.04 and 14.04). Expected: build page behaves fairly snappily a la Chrome Current: Entire Firefox browser hangs for 10-20 seconds at a time until I kill the tab. Workaround: I now use Chrome for CircleCI. This is not a good workaround for me. ---
**Author:** ![roman](https://sea2.discourse-cdn.com/circleci/user_avatar/discuss.circleci.com/roman/32/11390_2.png) [@roman](https://discuss.circleci.com/u/roman)\ **Post date:** [November 2, 2016, 11:11am UTC](https://discuss.circleci.com/t/firefox-largely-hangs-on-web-ui-when-viewing-a-running-build/7779/2 "2016-11-02T11:11:57Z")
Ditto. Seems to happen for me only while RSpec is running, not with other tasks. ---
**Author:** ![luxflux](https://sea2.discourse-cdn.com/circleci/user_avatar/discuss.circleci.com/luxflux/32/325_2.png) [@luxflux](https://discuss.circleci.com/u/luxflux)\ **Post date:** [November 7, 2016, 5:04pm UTC](https://discuss.circleci.com/t/firefox-largely-hangs-on-web-ui-when-viewing-a-running-build/7779/3 "2016-11-07T17:04:21Z")
Happens too for me, not specific to RSpec. ---
**Author:** ![KLFrost](https://avatars.discourse-cdn.com/v4/letter/k/ce73a5/32.png) [@KLFrost](https://discuss.circleci.com/u/KLFrost)\ **Post date:** [November 11, 2016, 7:03pm UTC](https://discuss.circleci.com/t/firefox-largely-hangs-on-web-ui-when-viewing-a-running-build/7779/4 "2016-11-11T19:03:28Z")
This is a huge annoyance for me; watching builds in progress is no longer a feasible part of my workflow. Using pants to build Scala code and run specs2 tests. Firefox 49.0.2, Mac OS X 10.11.6 ---
**Author:** ![aaugustin](https://sea2.discourse-cdn.com/circleci/user_avatar/discuss.circleci.com/aaugustin/32/3018_2.png) [@aaugustin](https://discuss.circleci.com/u/aaugustin)\ **Post date:** [November 16, 2016, 9:31pm UTC](https://discuss.circleci.com/t/firefox-largely-hangs-on-web-ui-when-viewing-a-running-build/7779/5 "2016-11-16T21:31:20Z")
I’m having the same issue and it’s annoying. ---
**Author:** ![sul4bh](https://sea2.discourse-cdn.com/circleci/user_avatar/discuss.circleci.com/sul4bh/32/5843_2.png) [@sul4bh](https://discuss.circleci.com/u/sul4bh)\ **Post date:** [November 17, 2016, 1:42am UTC](https://discuss.circleci.com/t/firefox-largely-hangs-on-web-ui-when-viewing-a-running-build/7779/6 "2016-11-17T01:42:33Z")
I have the same issue. ---
**Author:** ![mklinga](https://sea2.discourse-cdn.com/circleci/user_avatar/discuss.circleci.com/mklinga/32/14634_2.png) [@mklinga](https://discuss.circleci.com/u/mklinga)\ **Post date:** [November 18, 2016, 11:41am UTC](https://discuss.circleci.com/t/firefox-largely-hangs-on-web-ui-when-viewing-a-running-build/7779/7 "2016-11-18T11:41:54Z")
Having the same issue, I’ve always thought CircleCI was by nature very slow and unresponsive, but today I tried it with chrome and the UI just flies. On firefox, I keep getting constant freezes + the single build page is pretty much unusable. Versions: MacOS Sierra, firefox 50.0 ---
**Author:** ![huoxito](https://sea2.discourse-cdn.com/circleci/user_avatar/discuss.circleci.com/huoxito/32/809_2.png) [@huoxito](https://discuss.circleci.com/u/huoxito)\ **Post date:** [November 18, 2016, 5:31pm UTC](https://discuss.circleci.com/t/firefox-largely-hangs-on-web-ui-when-viewing-a-running-build/7779/8 "2016-11-18T17:31:34Z")
Surprised that no one from circleci staff has replied to this. Wonder if that means everything runs smoothly for them in Firefox. I see the same issue at least for the past week, latest Firefox Developer Edition, and jeeeez it’s annoying. Pls guys consider taking a look at this. ---
**Author:** ![rishimkumar](https://sea2.discourse-cdn.com/circleci/user_avatar/discuss.circleci.com/rishimkumar/32/4798_2.png) [@rishimkumar](https://discuss.circleci.com/u/rishimkumar)\ **Post date:** [November 23, 2016, 7:50pm UTC](https://discuss.circleci.com/t/firefox-largely-hangs-on-web-ui-when-viewing-a-running-build/7779/9 "2016-11-23T19:50:58Z")
Sorry for the lack of communication here. @KunalJain 's team just pushed a fix recently. Would love to hear if there are still issues! (we’ll update [changelog](https://circleci.com/changelog/) today as well!) ---
**Author:** ![huoxito](https://sea2.discourse-cdn.com/circleci/user_avatar/discuss.circleci.com/huoxito/32/809_2.png) [@huoxito](https://discuss.circleci.com/u/huoxito)\ **Post date:** [November 23, 2016, 8:40pm UTC](https://discuss.circleci.com/t/firefox-largely-hangs-on-web-ui-when-viewing-a-running-build/7779/10 "2016-11-23T20:40:47Z")
thanks a lot @rishimkumar o/ I haven’t seen any complains from Firefox today ---
**Author:** ![mklinga](https://sea2.discourse-cdn.com/circleci/user_avatar/discuss.circleci.com/mklinga/32/14634_2.png) [@mklinga](https://discuss.circleci.com/u/mklinga)\ **Post date:** [November 25, 2016, 11:56am UTC](https://discuss.circleci.com/t/firefox-largely-hangs-on-web-ui-when-viewing-a-running-build/7779/11 "2016-11-25T11:56:41Z")
Thanks @rishimkumar, the Firefox lag issues have indeed been fixed, at least for me 🙂 Great job! ---
**Author:** ![system](https://global.discourse-cdn.com/circleci/original/3X/5/1/511608acda8e85906e15909b57bd0a46c1dbe291.png) [@system](https://discuss.circleci.com/u/system)\ **Post date:** [June 18, 2018, 11:34am UTC](https://discuss.circleci.com/t/firefox-largely-hangs-on-web-ui-when-viewing-a-running-build/7779/12 "2018-06-18T11:34:27Z")