Browser stats

Every browser version the fuzzing network has run, and how many vectors behaved differently on it than on the version before. Behaviour is compared within a platform, OS and charset lane, so an OS difference is never mistaken for a version change.

Chrome

10 recent releases

• 153.0.8010.37no changes13 vectors tested2026-09-14
• 153.0.8010.363 changed268 vectors tested2026-09-15
• 153.0.0.0no changes1 vector tested2026-09-16
• 152.0.7977.84no changes62 vectors tested2026-09-14
• 152.0.7977.837 changed269 vectors tested2026-09-15
• 152.0.7977.821 changed95 vectors tested2026-09-09
• 152.0.7977.761 changed48 vectors tested2026-09-07
• 152.0.7977.751 changed2 vectors tested2026-09-03
• 152.0.7977.652 changed183 vectors tested2026-09-11
• 152.0.7977.641 changed179 vectors tested2026-09-07

Firefox

10 recent releases

• 155.05 changed52 vectors tested2026-09-13
• 154.05 changed278 vectors tested2026-09-05
• 153.0no changes251 vectors tested2026-09-11
• 152.3no changes1 vector tested2026-08-12
• 152.1.2no changes3 vectors tested2026-08-12
• 152.0no changes62 vectors tested2026-08-15
• 151.0no changes92 vectors tested2026-08-12
• 150.0no changes33 vectors tested2026-08-12
• 149.0no changes127 vectors tested2026-08-12
• 148.0no changes1 vector tested2026-08-12

Safari

10 recent releases

• 26.6.28 changed45 vectors tested2026-09-15
• 26.6.11 changed17 vectors tested2026-09-11
• 26.61 changed40 vectors tested2026-09-02
• 26.5.2no changes11 vectors tested2026-08-17
• 26.51 changed99 vectors tested2026-08-26
• 26.4no changes4 vectors tested2026-08-12
• 26.3.1no changes31 vectors tested2026-08-12
• 26.3no changes10 vectors tested2026-08-12
• 26.2no changes5 vectors tested2026-08-12
• 26.1no changes4 vectors tested2026-08-12

Microsoft Edge

10 recent releases

• 153.0.4234.327 changed159 vectors tested2026-09-16
• 152.0.4191.661 changed17 vectors tested2026-09-11
• 152.0.4191.62no changes1 vector tested2026-09-04
• 152.0.4191.532 changed245 vectors tested2026-09-04
• 151.0.4129.107no changes7 vectors tested2026-08-27
• 151.0.4129.101no changes3 vectors tested2026-08-22
• 151.0.4129.93no changes1 vector tested2026-08-19
• 151.0.4129.86no changes180 vectors tested2026-08-19
• 151.0.4129.78no changes27 vectors tested2026-08-14
• 151.0.4129.72no changes1 vector tested2026-08-13

47 behaviour changes across the releases listed. History keeps the newest 20 versions per browser lane, so older releases are pruned and coverage reflects what the network happened to run.