Open Bug 1954346 Opened 1 month ago Updated 1 month ago

TypeError in startTabDrag when dragging group label from tabs list

Categories

(Firefox :: Tabbed Browser, defect)

Product:
Firefox
Component:
Tabbed Browser
Type:
defect

Tracking

()

Tracking Flags:
Tracking Status
firefox-esr115 --- unaffected
firefox-esr128 --- unaffected
firefox136 --- affected
firefox137 --- affected
firefox138 --- affected

People

(Reporter: tabmix.onemen, Unassigned)

References

(Blocks 1 open bug)

Details

TypeError in startTabDrag when dragging group label from tabs list

Error in Nightly (2025-03-16)
(same error in 137.0b6, slightly different line number)

TypeError: can't access property "multiselected", tab is undefined tabs.js:708:11
startTabDrag chrome://browser/content/tabbrowser/tabs.js:708
_onDragStart moz-src:///browser/components/tabbrowser/TabsList.sys.mjs:522
handleEvent moz-src:///browser/components/tabbrowser/TabsList.sys.mjs:80
handleEvent moz-src:///browser/components/tabbrowser/TabsList.sys.mjs:319

Error in Firefox 136.0.1

TypeError: dtTab is undefined tabs.js:720:25
    startTabDrag chrome://browser/content/tabbrowser/tabs.js:720
    _onDragStart resource:///modules/TabsList.sys.mjs:520
    handleEvent resource:///modules/TabsList.sys.mjs:80
    handleEvent resource:///modules/TabsList.sys.mjs:319
Severity: -- → S3
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