commit 3831da21b6bac9e6cf21ba7d4e48217a6b14e73a Author: Georg Koppen <gk@torproject.org> Date: Fri Sep 5 16:12:23 2014 +0000 Bug 12947: Adapt session storage blocker to ESR 31. --- src/components/tbSessionStore.js | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/src/components/tbSessionStore.js b/src/components/tbSessionStore.js index 039e223..7281bcf 100644 --- a/src/components/tbSessionStore.js +++ b/src/components/tbSessionStore.js @@ -85,8 +85,15 @@ TBSessionBlocker.prototype = { if (topic != "sessionstore-state-write") return; this.logger.log(3, "Got Session Store observe: "+topic); - subject = subject.QueryInterface(Ci.nsISupportsString); - + // In ESR 31 |subject| is |null| in non-private browsing mode. Thus, we + // are not able to clean anything. In Private Browsing Mode nothing is + // written in the first place and therefore no |sessionstore-state-write| + // notification is emitted. + try { + subject = subject.QueryInterface(Ci.nsISupportsString); + } catch (e) { + this.logger.log(3, "We got no data to clean"); + } // Bug 1506: This is the only important bit, other than // the registration goop. You don't even need the JSON // garbage...