Chrome extension for finding label values by API Name
https://chrome.google.com/webstore/detail/salesforce-label-value-fi/fkfojajaneghcjhccheafhlldhaeieif
In Chrome go to : Settings-> Extensions click "Load unpackaged extensions..." and select the folder where the project files are stored.
When on any Salesforce page(Except visualforce domains), Click on the icon that say "L". Enter the desired API label name(case sensitive). If the org contains the Label the box will give the label value.