Browser: fix translations

Change-Id: Ic51787117758ae0e835f4ae68ae52bba008ae6be
Browser: ES translations

- Transifex export

Change-Id: Iaa34ef4eb5f5bc6a9c0199f170b9f70375fc2f95
Browser: Remove unused strings

Change-Id: Ib83f179f71dee3b33f6dfbd3a86f1108cffba350