Listed here the monthly usage statistics of different versions of Firefox browser in 2015 worldwide.
2015 | 2016 || 2015 | F 49 | F 46 | F 45 | F 44 | F 43 | F 42 | F 41 | Others |
| December | 0 | 0.11 | 0.24 | 1.59 | 21.16 | 38.69 | 3.55 | 34.66 |
| November | 0 | 0.07 | 0.34 | 3.55 | 38.57 | 17.74 | 4.98 | 34.75 |
| October | 0 | 0.1 | 0.49 | 5.51 | 50.46 | 9.34 | 3.2 | 30.9 |
| September | 0.01 | 0.12 | 2.68 | 15.81 | 49.43 | 4.48 | 5.29 | 22.18 |
| August | 0 | 0.05 | 0.27 | 8.64 | 30.18 | 28.06 | 6.33 | 26.47 |
| July | 0.09 | 0.52 | 3.72 | 38.48 | 17.53 | 2.85 | 2.75 | 34.06 |
| June | 0 | 0.08 | 0.38 | 4.19 | 49.77 | 5.58 | 2.96 | 37.04 |
| May | 0.02 | 0.18 | 0.37 | 24.33 | 32.64 | 3.08 | 2.36 | 37.02 |
| April | 0.07 | 0.22 | 3.86 | 38.46 | 14.06 | 2.94 | 1.41 | 38.98 |
| March | 0 | 0.04 | 0.3 | 3.85 | 45.51 | 12.39 | 1.58 | 36.33 |
| February | 0 | 0 | 0.07 | 0.58 | 6.85 | 56.62 | 3.35 | 32.53 |
| January | 0.03 | 0.09 | 1.59 | 43.48 | 28 | 3.99 | 1.01 | 21.81 |
Statistics mentioned here are based on the usage of the web browsers. Find most used browser of the year 2015.