| Package | Affected versions | Patched versions |
|---|---|---|
| firefox | < 45.6.0< 51.0 | 45.6.051.0 |
| thunderbird | < 45.6.0 | 45.6.0 |
An attacker could use a JavaScript Map/Set timing attack to determine whether an atom is used by another compartment/zone in specific contexts. This could be used to leak information, such as usernames embedded in JavaScript code, across websites. This vulnerability affects Firefox < 50.1, Firefox ESR < 45.6, and Thunderbird < 45.6.
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