v1.1.1: Tab Behavior regression when swapping workspaces

[DilectableBananaButterfly]

Workspace behavior is regressed from previous version, tested on Nightly 58.

To reproduce:
1: Open several tabs (w/ containers) in Workspace 1
2: Create Workspace 2
3: Open a few tabs
4: Swap to Workspace 1 (w2 tabs go away, w1 tabs reappear)
5: Swap to Workspace 2 (w1 tabs REMAIN, w2 tabs are ADDED)

[fonse]

That's weird. It works fine on Firefox 57.

I'll download 58 and try it in the weekend.

[DilectableBananaButterfly]

57b6 testing:

Initial Step:
Workspace 1: 6 sites open
1: Container A
1: Container B
2: Container C
2: Default

Step 2: Create New Workspace: Workspace 2
-> All above tabs disappear
-> new-tab operation enacted

Step 3:
Workspace 2: 5 sites open
1: Container A
2: container B
1: container C
1: Default

Step 4: Switch from W2 to W1
W2 tabs deleted
W1 tabs re-opened

Step 5: W1 to W2
W1 tabs deleted
W2 tabs re-opened

! this is correct behavior

Step 6: Close browser/re-open browser
W1 and W2 are saved, W2 active.

Step 7: Open W1
W2 tabs REMAIN: ! errant behavior
1 W1 tab re-opens ! errant behavior
W2 remains 'active' !errant behavior

Step 8: Attempt to open W1 again (and again)
No tabs are deleted
The 1 tab from W1 re-opens anew with each try
W2 remains 'active'