[abdullahkhalids]

A good chunk of linux and related development is done by programmers being paid by some for-profit company in whose interest is it either to have those chunks developed or who want to keep their employees happy by letting them do open source contributions. Without this invisible injection of funds, linux development would slow down significantly and it might not remain competitive.

Browsers are a lot less modular than operating systems and they operate in a different market (eg. contributing to their development doesn't help the bottom line of any company particularly), so Firefox doesn't get a lot of paid for third-party developer time. Hence, Mozilla makes unfortunate compromises.