The problem happens only in the case when "Reload All Tabs" pane is indicated. See attached screenshot. STR. 1. Open any page e.g https://www.wikipedia.org/ 2. Open about:preferences#privacy 3. Switch to "Standard" if not standard 4. Switch to "Custom" --- make sure "Reload All Tabs" pane is indicated. If not goto step3 5. Click one dropdown list
Bug 1599783 Comment 6 Edit History
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The problem happens only in the case when "Reload All Tabs" pane is indicated. See attached screenshot. STR. 1. Open any page e.g https://www.wikipedia.org/ 2. Open about:preferences#privacy 3. Switch to "Standard" if not standard. and then switch to "Strict" 4. Switch to "Custom" --- make sure "Reload All Tabs" pane is indicated. If not, reload the webpage of step 1 and goto step3 5. Click one dropdown list Regression window: https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=5e6b050c9427da9ae37ca4c7c8000ba5b47ceea8&tochange=1a85c571a4645798ba4d9295ba2504acac149ac8