Update minimum supported chrome and firefox versions #24428
Merged
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Bump
OLDEST_SUPPORTED_CHROME
from 45 to 55Bump
OLDEST_SUPPORTED_FIREFOX
from 40 to 50These versions we chosen semi-arbitrarily but they have release dates roughly in line with the existing
OLDEST_SUPPORTED_SAFARI
and they also also us to remove a some ancient workarounds and are most likely not used anywhere today.