On Nightly 72.0a1 (build ID: 20191112094307) I got a different result. The steps to reproduce in the initial comment work as I expected. But I saw a different unexpected result with following steps: 1. Go to `about:config` and ensure that `extensions.webextensions.remote` is `true`. (This problem requires enabled e10s for addons.) 2. Go to `about:debugging`. 3. Load the attached test case as a temporary addon. Then a sidebar panel is loaded. 4. Start dragging on the box `2. Drag me, and move...` in the sidebar. 5. Move your mouse outside the sidebar and release the button immediately before the text in the box is changed (within 3 sec). 6. Click anywhere in the content area. # Actual result * At the step 5: only `DragStart` is reported but `DragOver` and `DragEnd` are never reported. * At the step 6: a `DragEnd` is reported. And after that drag-and-drop of both boxes `1. Drag me...` and `4. Try to...` reports all `DragStart`, `DragOver` and `DragEnd` events. # Expected result * At the step 5: a `DragEnd` is reported after a `DragStart`. * At the step 6: nothing is reported.
Bug 1595883 Comment 1 Edit History
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On Nightly 72.0a1 (build ID: 20191112094307) I got a different result. The steps to reproduce in the initial comment work as I expected. But I saw a different unexpected result with following steps: 1. Go to `about:config` and ensure that `extensions.webextensions.remote` is `true`. (This problem requires enabled e10s for addons.) 2. Go to `about:debugging`. 3. Load the attached test case as a temporary addon. Then a sidebar panel is loaded. 4. Start dragging on the box `2. Drag me, and move...` in the sidebar. 5. Move your mouse outside the sidebar and release the button immediately before the text in the box is changed (within 3 sec). 6. Click anywhere in the content area. Please pay attention that you don't move the cursor across the sidebar area. # Actual result * At the step 5: only `DragStart` is reported but `DragOver` and `DragEnd` are never reported. * At the step 6: a `DragEnd` is reported. # Expected result * At the step 5: a `DragEnd` is reported after a `DragStart`. * At the step 6: nothing is reported.