Mozilla has been watching the user share of its flagship Firefox web browser shrink for a while, so it was hardly a surprise last week when the company announced it was doing some belt tightening that would result in another round of layoffs. What was a surprise were the numbers involved: The company is laying off about 250 employees, for a staff reduction of 25%, and is completely closing its operations in Taipei, Taiwan. In addition, 60 employees will be shifted to new jobs, and the company will reduce spending on such things as developer tools, internal tooling and platform...