Old stats here but the Canadian usage of Firefox is significantly higher than elsewhere – further evidence of the geekiness of Canada.

The most popular browsers on the web are:

1. Microsoft IE   85.45 %

2. Mozilla Firefox  11.51 %

3. Apple Safari  1.75 %

4. Netscape  0.26 %

5. Opera  0.77 %

The most popular browsers in the USA are:

1. Microsoft IE  80.73 %

2. Mozilla Firefox  14.07 %

3. Apple Safari  3.55 %

4. Netscape  0.76 %

5. Opera  0.77 %

The most popular browsers in Canada are:

1. Microsoft IE  78.52 %

2. Mozilla Firefox  16.98 %

3. Apple Safari  2.05 %

4. Netscape  0.68 %

5. Opera  1.67 %

The most popular browsers in the UK are:

1. Microsoft IE  93.37 %

2.Mozilla Firefox  4.94 %

3. Apple Safari  0.99 %

4. Netscape  0.23 %

5. Opera  0.39 %

Source: Mozilla Firefox global usage share is still growing