hello! i researched and could reproduce the bug with Firefox 68.4.1esr (64-bit)
your first question:
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there NO signs of issues in the logs.
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the console gave me this:
Errors:
uncaught exception: 2147746065
NetworkError when attempting to fetch resource. 2 RemoteSettingsClient.jsm:280:12
get resource://services-settings/RemoteSettingsClient.jsm:280
AsyncFunctionThrow self-hosted:843
NetworkError when attempting to fetch resource. ASRouter.jsm:104:8
reportError resource://activity-stream/lib/ASRouter.jsm:104
_remoteLoader resource://activity-stream/lib/ASRouter.jsm:172
AsyncFunctionThrow self-hosted:843
Warnings:
Unknown category for SetEventRecordingEnabled: fxmonitor
Loading mixed (insecure) display content “http://wiki2.zzz.xxxx.yyyy…ch/bin/resources/icons/xwiki/spinner.gif” on a secure page
jquery.min.js:3:18129
nsLoginManager: searchLogins: formSubmitURL
or httpRealm
is recommended LoginManager.jsm:457:13
Loading mixed (insecure) display content “http://wiki2.zzz.xxxx.yyyy…ch/bin/resources/icons/xwiki/spinner.gif” on a secure page
jquery.min.js:3:18129
Key event not available on some keyboard layouts: key=“i” modifiers=“accel,alt,shift” id=“key_browserToolbox” browser.xul
Loading mixed (insecure) display content “http://wiki2.zzz.xxxx.yyyy…ch/bin/resources/icons/xwiki/spinner.gif” on a secure page
2 jquery.min.js:3:18129
Error while detaching the thread front: ‘detach’ request packet to ‘server1.conn0.child1/context18’ can’t be sent as the connection is closed.
CSS:
Stylesheets without CSSOM changes reparsed to check for errors. Refresh the page to also see errors from stylesheets changed from CSSOM and from style attributes. 3
Unknown property ‘user-select’. Declaration dropped. reps.css:23:15
Elements matching selector: .tree.noselect
NodeList []
Stylesheets without CSSOM changes reparsed to check for errors. Refresh the page to also see errors from stylesheets changed from CSSOM and from style attributes.
- different users: yes
- different browsers: yes
after documenting the Errors (only with FF because it’s going to be the browser for everybody), i emptied the cached web content as well as the history. then refreshed and the page contents where there again.
i hope i managed to retrieve information that you can use!!