There is two tags that have the same meaning:
One option is to retag the one question with the [browser] tag instead.
Another option is to suggest the synonym web-browser to be remapped to browser - making it work for future wrong tagging. But this option must be done by someone having a score of 5 or more on the web-browser tag (that one question) and having more then 2500 reps, witch narrows it done to 1 person only.
Which option do we use in this case?