Firefox was mostly a middle-of-the-roader in the various tests. It only produced one 'best' score, in the Math subtest of the SunSpider JavaScript Benchmark. Firefox was unable to complete the Acid3 test, but it came about as close as possible to completing the test without actually crossing the finish line.
Firefox's middle-of-the-road performance doesn't mean it's an also-ran. Firefox remains one of the standard browsers against which all web developers test their products. Because of Firefox's dominant position, you can be pretty sure that any web site will work with it.
Peacekeeper
Larger numbers indicate better performance.
- Overall: 3144
- Rendering: 2942
- Social Networking: 2777
- Complex Graphics: 4177
- Data: 4087
- DOM: 2618
- Text Parsing: 3516
Acid3
Did not complete: 94/100
V8 Benchmark v6
Larger numbers indicate better performance.
- Overall: 679
- Richards: 2306
- DeltaBlue: 235
- Crypto: 2425
- RayTrace: 452
- EarleyBoyer: 377
- RegExp: 363
- Splay: 819
SunSpider JavaScript Benchmark
Time in milliseconds; smaller is better.
- Overall: 591.6 ms
- 3D: 88.6 ms
- Access: 87.2 ms
- Bitops: 23.8 ms
- Controlflow: 24.2 ms
- Crypto: 34.4 ms
- Date: 98.2 ms
- Math: 18.0 ms *
- RegExp: 32.4 ms
- String: 185.0 ms
* Highest score in a test
** Lowest score in a test
