STEPS TO REPRODUCE: 1. Set some breakpoints on a somewhat unique resource, like the main HTML page. 2. Navigate to an unrelated website. 3. Click the browser "back" button 4. You should immediately hit the breakpoint ACTUAL: The breakpoint is shown as dark gray (enabled but unresolved). EXPECTED: It should be dark blue (enabled and resolved). Notes: This seems masked prior to fix for the blocking bug 151581; in that case, breakpoints might not be saved on pagehide, so there's nothing to save the new breakpoints as we navigate away.