Firefox error on vaadin 7/8

Vaadin 6 / 7 / 8 Framework UI
1

Gentlefolk,
we have two different vaadin apps, one running vaadin 7 and the other vaadin 8.

The two apps share very little common code.

A recent firefox update seems to have broken the logins of both of these apps.

The error we are seeing is:


Tue Jun 11 11:14:35 GMT+1000 2019 com.vaadin.client.ApplicationConfiguration
SEVERE: undefinedjava.lang.ClassCastException
	at Unknown._r(https://xxxx/context/ui line 9 > scriptElement)
	at Unknown.sy(https://xxxx.somedomain.com/context/ui line 9 > scriptElement)
	at Unknown.$We(https://xxxx.somedomain.com/context/ui line 9 > scriptElement)
	at Unknown.qV(https://xxxx.somedomain.com/context/ui line 9 > scriptElement)
	at Unknown.EQ(https://xxxx.somedomain.com/context/ui line 9 > scriptElement)
	at Unknown.AQ(https://xxxx.somedomain.com/context/ui line 9 > scriptElement)
	at Unknown.zQ(https://xxxx.somedomain.com/context/ui line 9 > scriptElement)
	at Unknown.RQ(https://xxxx.somedomain.com/context/ui line 9 > scriptElement)
	at Unknown.Dvc(https://xxxx.somedomain.com/context/ui line 9 > scriptElement)
	at Unknown.cIc(https://xxxx.somedomain.com/context/ui line 9 > scriptElement)
	at Unknown.Svc(https://xxxx.somedomain.com/context/ui line 9 > scriptElement)
	at Unknown.pvc(https://xxxx.somedomain.com/context/ui line 9 > scriptElement)
	at Unknown.KA(https://xxxx.somedomain.com/context/ui line 9 > scriptElement)
	at Unknown.CA(https://xxxx.somedomain.com/context/ui line 9 > scriptElement)
	at Unknown.OA(https://xxxx.somedomain.com/context/ui line 9 > scriptElement)
	at Unknown.IA(https://xxxx.somedomain.com/context/ui line 9 > scriptElement)
	at Unknown.eA(https://xxxx.somedomain.com/context/ui line 9 > scriptElement)
	at Unknown.hA(https://xxxx.somedomain.com/context/ui line 9 > scriptElement)
	at Unknown.gA/<(https://xxxx.somedomain.com/context/ui line 9 > scriptElement)
	at Unknown.d(https://xxxx.somedomain.com/context/ui line 9 > scriptElement)
	at Unknown.anonymous(Unknown)
ui line 9 > scriptElement:1:15131
    BPb https://xxxx.somedomain.com/context/ui line 9 > scriptElement:1
    qQb https://xxxx/context/ui line 9 > scriptElement:45
    pQb https://xxxx.somedomain.com/context/ui line 9 > scriptElement:152
    Xbf https://xxxx.somedomain.com/context/ui line 9 > scriptElement:306
    xvc https://xxxx.somedomain.com/context/ui line 9 > scriptElement:1
    mA https://xxxx.somedomain.com/context/ui line 9 > scriptElement:182
    KA https://xxxx.somedomain.com/context/ui line 9 > scriptElement:9
    CA https://xxxx.somedomain.com/context/ui line 9 > scriptElement:45
    OA https://xxxx.somedomain.com/context/ui line 9 > scriptElement:1
    IA https://xxxx.somedomain.com/context/ui line 9 > scriptElement:165
    eA https://xxxx.somedomain.com/context/ui line 9 > scriptElement:290
    hA https://xxxx.somedomain.com/context/ui line 9 > scriptElement:62
    gA https://xxxx.somedomain.com/context/ui line 9 > scriptElement:50
    d https://xxxx.somedomain.com/context/ui line 9 > scriptElement:58
2

Have you tried the Vaadin 8 app with 8.8.2? https://github.com/vaadin/framework/releases/tag/8.8.2 There’s a fix to a Firefox 67 issue there.

3

Upgrading to 8.8.2 fixed the issue.

Thanks.

4

For Vaadin 7, the same fix is included in the commercial Extended Support release 7.7.19.

Firefox 68 should also fix the regression.