# Firefox Developer Edition (en-US) 129.0

Firefox Developer Edition (en-US) 129.0, released July 9, 2024, fixes 18 CVEs in Firefox Developer Edition (en-US). None of them is reported as exploited. Patch Radar priority: High. The latest Firefox Developer Edition (en-US) is 156.0, which also fixes every one of these CVEs.

- Web page: https://patchblox.com/security/fix/windows-app/mozilla.firefox.developeredition-129.0
- Platform: Windows apps
- Released: Jul 9, 2024
- Priority: High (Closes CVE-2024-7520, high severity)
- CVEs: 18, exploited: 0, on CISA KEV: 0
- Superseded by: [Firefox Developer Edition (en-US) 156.0](https://patchblox.com/security/data/product/windows-app/firefox-developer-edition-en-us.md), the latest version, which also fixes every CVE listed here

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [Firefox Developer Edition (en-US)](https://patchblox.com/security/data/product/windows-app/firefox-developer-edition-en-us.md) |  | 129.0 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2024-7520](https://patchblox.com/security/data/cve/CVE-2024-7520.md) | High | Mozilla Firefox ESR and 6 others: Improper Control of Generation of Code ('Code Injection') | 9.6 | 0.0064 |  |
| [CVE-2024-7522](https://patchblox.com/security/data/cve/CVE-2024-7522.md) | High | Mozilla Firefox ESR and 6 others: Out-of-bounds Read | 9.6 | 0.0063 |  |
| [CVE-2024-7519](https://patchblox.com/security/data/cve/CVE-2024-7519.md) | High | Mozilla Firefox ESR and 6 others: Out-of-bounds Write | 9.6 | 0.0063 |  |
| [CVE-2024-7521](https://patchblox.com/security/data/cve/CVE-2024-7521.md) | High | Mozilla Firefox ESR and 6 others: Improper Handling of Exceptional Conditions | 9.6 | 0.0062 |  |
| [CVE-2024-7527](https://patchblox.com/security/data/cve/CVE-2024-7527.md) | High | Mozilla Firefox ESR and 6 others: Use After Free | 9.6 | 0.0061 |  |
| [CVE-2024-7525](https://patchblox.com/security/data/cve/CVE-2024-7525.md) | High | Mozilla Firefox ESR and 6 others: Improper Access Control | 9.6 | 0.0060 |  |
| [CVE-2024-7526](https://patchblox.com/security/data/cve/CVE-2024-7526.md) | High | Mozilla Firefox ESR and 6 others: Use of Uninitialized Resource | 9.6 | 0.0058 |  |
| [CVE-2024-7529](https://patchblox.com/security/data/cve/CVE-2024-7529.md) | High | Mozilla Firefox ESR and 6 others: User Interface (UI) Misrepresentation of Critical Information | 9.6 | 0.0053 |  |
| [CVE-2024-7528](https://patchblox.com/security/data/cve/CVE-2024-7528.md) | High | Mozilla Firefox ESR and 6 others: Use After Free | 9.6 | 0.0052 |  |
| [CVE-2024-7518](https://patchblox.com/security/data/cve/CVE-2024-7518.md) | High | Mozilla Firefox ESR and 6 others: Improper Restriction of Rendered UI Layers or Frames | 9.6 | 0.0051 |  |
| [CVE-2025-4093](https://patchblox.com/security/data/cve/CVE-2025-4093.md) | High | Memory safety bug fixed in Firefox ESR 128.10 and Thunderbird 128.10 | 8.8 | 0.0049 |  |
| [CVE-2024-7524](https://patchblox.com/security/data/cve/CVE-2024-7524.md) | High | Mozilla Firefox ESR and 4 others: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | 9.6 | 0.0049 |  |
| [CVE-2025-5269](https://patchblox.com/security/data/cve/CVE-2025-5269.md) | High | Memory safety bug fixed in Firefox ESR 128.11 and Thunderbird 128.11 | 8.8 | 0.0048 |  |
| [CVE-2024-8900](https://patchblox.com/security/data/cve/CVE-2024-8900.md) | High | Mozilla Firefox ESR and 7 others: Incorrect Permission Assignment for Critical Resource | 7.5 | 0.0043 |  |
| [CVE-2024-7530](https://patchblox.com/security/data/cve/CVE-2024-7530.md) | High | Mozilla Firefox ESR and 4 others: Use After Free | 8.8 | 0.0038 |  |
| [CVE-2024-7523](https://patchblox.com/security/data/cve/CVE-2024-7523.md) | High | Mozilla Firefox ESR and 4 others: Improper Restriction of Rendered UI Layers or Frames | 8.1 | 0.0028 |  |
| [CVE-2025-4084](https://patchblox.com/security/data/cve/CVE-2025-4084.md) | Routine | Potential local code execution in "copy as cURL" command | 5.7 | 0.0045 |  |
| [CVE-2024-7531](https://patchblox.com/security/data/cve/CVE-2024-7531.md) | Routine | Mozilla Firefox ESR and 4 others: Time-of-check Time-of-use (TOCTOU) Race Condition | 6.5 | 0.0044 |  |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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