Tracked site: https://mozilla.com/.
Checked against the Web 1.0 Specification
(2026 Edition), front page
only, roughly every two weeks.
F
Fails on multiple major faults.
Latest check: 2026-09-28.
2 major, 4 minor;
4.5 MB first-party transfer,
710 requests.
Rule by rule
| Rule | Fault | Result |
|---|
| JS-01 | JavaScript |
MAJOR
- inline <script>
- <script src="https://www.firefox.com/media/js/site.500a27b182b4.js">
- <script src="https://www.firefox.com/media/js/gtm-snippet.89b99d826e6b.js">
- <script src="https://www.firefox.com/media/js/sentry.813bb8bfa2a6.js">
- <script src="https://www.firefox.com/media/js/lib.5f2f57c5be45.js">
- and 9 more
|
| TP-01 | Third-party requests |
pass |
| CK-01 | Cookies |
pass |
| WT-01 | Excessive transfer |
MAJOR
- total first-party transfer 4.51 MB (over 2 MB)
|
| AV-01 | Autoplaying media |
pass |
| HY-01 | Missing doctype |
pass |
| HY-02 | Missing title |
pass |
| HY-03 | Missing language |
pass |
| HY-04 | Missing charset |
pass |
| HY-05 | Missing alt text |
pass |
| FT-01 | Web fonts |
3 minor
- @font-face in https://www.firefox.com/media/css/flare_base.946b9d141f87.css
- @font-face in https://www.firefox.com/media/css/flare_base.946b9d141f87.css
- @font-face in https://www.firefox.com/media/css/flare.80bdaeb68c35.css
- @font-face in https://www.firefox.com/media/css/flare.80bdaeb68c35.css
- @font-face in https://www.firefox.com/media/css/flare.80bdaeb68c35.css
- and 1 more
|
| RQ-01 | Excessive requests |
1 minor
|
| FR-01 | First-party frame |
pass |
History
| Date | Grade | Majors | Minors |
Weight | Requests |
|---|
| 2026-09-28 |
F |
2 |
4 |
4.5 MB |
710 |
| 2026-09-14 |
F |
2 |
4 |
4.5 MB |
710 |
| 2026-08-31 |
F |
2 |
4 |
4.5 MB |
708 |
| 2026-08-17 |
F |
2 |
4 |
4.5 MB |
707 |