- ie6 which was a security nightmare for everybody
- browsers like Opera developed by very small companies against which competition was more based on merit
The only way for Mozilla have been able to maintain its market share against chrome would have to manage to reach both these requirements:
- build the #1 smartphone OS in the market in term of market share to have it preinstalled everywhere
- build the #1 search engine in term of market share to advertise using it everytime the user search for something.
Both feats requiring:
- financial means that were out of reach from the Mozilla foundation at any moment in time regardless of its management.
- giving up on mozilla ethics and values to be on same level as the definitely evil competitor.