[v2][bug] vETH2 balance fails to load on FF / err in console

degen says:

I know withdrawals are locked, not in a rush to withdraw, but when I noticed its not reading my balance I thought I'd best look into it. I cleared the cache yesterday, restarted my browser / machine, connected and disconnected

user has tried suggested recs.
latest code loads.
as demonstrated by the updated withdraw message from
pr
https://github.com/SharedStake/SharedStake-ui/commit/e4058d4e1a9ab05c64c3772cdd76fa11592074af showing up for the user.

repro

try withdrawals deposit on firefox

error msg:

Uncaught (in promise) TypeError: u.o is undefined
    t RedemptionBase.vue:408
    s vue-ellipse-progress.umd.min.js:1
    r vue-ellipse-progress.umd.min.js:1
    _ vue-ellipse-progress.umd.min.js:1
    Babel 4
    getUserApprovedVEth2 RedemptionBase.vue:407
    t RedemptionBase.vue:466
    s vue-ellipse-progress.umd.min.js:1
    r vue-ellipse-progress.umd.min.js:1
    _ vue-ellipse-progress.umd.min.js:1
    Babel 6
    refreshBalances RedemptionBase.vue:464
    a RedemptionBase.vue:291
    s vue-ellipse-progress.umd.min.js:1
    r vue-ellipse-progress.umd.min.js:1
    _ vue-ellipse-progress.umd.min.js:1
    Babel 4
    handler RedemptionBase.vue:288
    VueJS 10
    setAddress module.js:58
    A vuex.esm.js:844
    commit vuex.esm.js:466
    commit vuex.esm.js:465
    _withCommit vuex.esm.js:624
    commit vuex.esm.js:464
    commit vuex.esm.js:409
    address onboard.js:71
    Bn onboard-2904fed0.js:8461
    n onboard-2904fed0.js:987
    af78/oa/setStateSyncer/aa[a]</< onboard-2904fed0.js:2469
    promise callback*onChange onboard-2904fed0.js:1284
    af78/oa/setStateSyncer/aa[a]< onboard-2904fed0.js:2465
    setStateSyncer onboard-2904fed0.js:2461
    ra onboard-2904fed0.js:2329
    n onboard-2904fed0.js:987
    i onboard-2904fed0.js:995
    e onboard-2904fed0.js:6191
    s vue-ellipse-progress.umd.min.js:1
    r vue-ellipse-progress.umd.min.js:1
    _ vue-ellipse-progress.umd.min.js:1
    S onboard-2904fed0.js:31
    c onboard-2904fed0.js:33
    promise callback*S onboard-2904fed0.js:31
    c onboard-2904fed0.js:33
    A onboard-2904fed0.js:33
    A onboard-2904fed0.js:31
    z onboard-2904fed0.js:6211
    q onboard-2904fed0.js:6106
    h onboard-2904fed0.js:4695
    i onboard-2904fed0.js:4108
    u onboard-2904fed0.js:3914
    be onboard-2904fed0.js:218
    m onboard-2904fed0.js:3910
    nt onboard-2904fed0.js:819
    m onboard-2904fed0.js:4143
    m onboard-2904fed0.js:4563
    nt onboard-2904fed0.js:819
    m onboard-2904fed0.js:5605
    m onboard-2904fed0.js:5822
    m onboard-2904fed0.js:3086
RedemptionBase.vue:408

guesses: undefined object with some onboard js traces.

maybe updating deps will help as in https://github.com/SharedStake/SharedStake-ui/issues/165
potentially linked to previously seen issues with brave/ff https://github.com/SharedStake/SharedStake-ui/issues/152

have asked user to try chrome

SharedStake / SharedStake-ui

[v2][bug] vETH2 balance fails to load on FF / err in console #181