Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Period | Internet Explorer | Firefox | Chrome | Safari | Opera | Other |
| --- | --- | --- | --- | --- | --- | --- |
| 2013 Q1 | 55.58% | 20.09% | 16.76% | 5.32% | 1.77% | 0.48% |
| 2012 Q4 | 54.56% | 20.07% | 17.95% | 5.26% | 1.67% | 0.49% |
| 2012 Q3 | 53.52% | 19.87% | 19.44% | 5.07% | 1.57% | 0.53% |
| 2012 Q2 | 54.05% | 19.98% | 19.18% | 4.71% | 1.60% | 0.48% |
| 2012 Q1 | 53.16% | 20.80% | 18.83% | 5.03% | 1.67% | 0.51% |
| 2011 Q4 | 52.32% | 22.10% | 18.43% | 5.09% | 1.60% | 0.46% |
| 2011 Q3 | 55.29% | 22.63% | 15.28% | 4.74% | 1.69% | 0.37% |
Question:
What is the other that has 20.80% as the firefox?
Answer:
0.51%