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-rw-r--r--toolkit/modules/sessionstore/FormData.jsm2
1 files changed, 1 insertions, 1 deletions
diff --git a/toolkit/modules/sessionstore/FormData.jsm b/toolkit/modules/sessionstore/FormData.jsm
index f90ba5825..d4fb08d93 100644
--- a/toolkit/modules/sessionstore/FormData.jsm
+++ b/toolkit/modules/sessionstore/FormData.jsm
@@ -216,7 +216,7 @@ var FormDataInternal = {
// We want to avoid saving data for about:sessionrestore as a string.
// Since it's stored in the form as stringified JSON, stringifying further
// causes an explosion of escape characters. cf. bug 467409
- if (isRestorationPage(ret.url)) {
+ if (isRestorationPage(ret.url) && ret.id && ret.id.sessionData) {
ret.id.sessionData = JSON.parse(ret.id.sessionData);
}