Exception: NS_ERROR_DOM_QUOTA_REACHED: Persistent storage maximum size reached

I get an 'An error occurred' whenever opening https://bugreports.qt.io/secure/RapidBoard.jspa?rapidView=16&view=detail&selectedIssue=QTBUG-68523 :

Details

1:

• Exception: NS_ERROR_DOM_QUOTA_REACHED: Persistent storage maximum size reached
• Resource: https://bugreports.qt.io/s/3996fe0d0060bbc148ed971f78c3559d-CDN/-fyc67a/711002/7b049b77f66e256a8f5944987495e729/ce002a21cbfbd771c7d11a1bd51c9399/_/download/contextbatch/js/greenhopper-rapid-non-gadget,atl.general,gh-rapid,jira.project.sidebar,com.atlassian.jira.projects.sidebar.init,jira.global,jira.general,-_super/batch.js?agile_global_admin_condition=true&is-server-instance=true&jag=true&jaguser=true&locale=en-US&nps-acknowledged=true&nps-not-opted-out=true&richediton=true&spectrum=true&whisper-enabled=true
• Line: 525
• Column: 0

Environment

Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:62.0) Gecko/20100101 Firefox/62.0

Stack trace

• l.set@https://bugreports.qt.io/s/3996fe0d0060bbc148ed971f78c3559d-CDN/-fyc67a/711002/7b049b77f66e256a8f5944987495e729/ce002a21cbfbd771c7d11a1bd51c9399/_/download/contextbatch/js/greenhopper-rapid-non-gadget,atl.general,gh-rapid,jira.project.sidebar,com.atlassian.jira.projects.sidebar.init,jira.global,jira.general,-_super/batch.js?agile_global_admin_condition=true&is-server-instance=true&jag=true&jaguser=true&locale=en-US&nps-acknowledged=true&nps-not-opted-out=true&richediton=true&spectrum=true&whisper-enabled=true:525:647
• f@https://bugreports.qt.io/s/3996fe0d0060bbc148ed971f78c3559d-CDN/-fyc67a/711002/7b049b77f66e256a8f5944987495e729/ce002a21cbfbd771c7d11a1bd51c9399/_/download/contextbatch/js/greenhopper-rapid-non-gadget,atl.general,gh-rapid,jira.project.sidebar,com.atlassian.jira.projects.sidebar.init,jira.global,jira.general,-_super/batch.js?agile_global_admin_condition=true&is-server-instance=true&jag=true&jaguser=true&locale=en-US&nps-acknowledged=true&nps-not-opted-out=true&richediton=true&spectrum=true&whisper-enabled=true:534:507
• h@https://bugreports.qt.io/s/3996fe0d0060bbc148ed971f78c3559d-CDN/-fyc67a/711002/7b049b77f66e256a8f5944987495e729/ce002a21cbfbd771c7d11a1bd51c9399/_/download/contextbatch/js/greenhopper-rapid-non-gadget,atl.general,gh-rapid,jira.project.sidebar,com.atlassian.jira.projects.sidebar.init,jira.global,jira.general,-_super/batch.js?agile_global_admin_condition=true&is-server-instance=true&jag=true&jaguser=true&locale=en-US&nps-acknowledged=true&nps-not-opted-out=true&richediton=true&spectrum=true&whisper-enabled=true:534:1026