There’s not really much actual solid research which demonstrates that calorie-counting is an effective method of weight loss.
https://www.health.harvard.edu/staying-healthy/stop-counting-calories
Moreover, there’s not really much solid research which demonstrates that weight loss should even be the focus of improving our health. People who are considered “overweight” based on their BMI score (which is another completely arbitrary and unhelpful metric) should not be focusing on weight loss.
The thing that people should be focusing on is simply any type of regular physical activity. It doesn’t particularly matter much what that activity is, it’s far more effective to choose an activity you enjoy.
Some of the older stuff is indeed that way, but there are more and more features which Firefox can’t support. Web-based custom keyboard configuration tools, tools to flash phone firmware, and one niche MiniDisc tool all are chrome-only things I’ve had to open Chrome to use