Revert "Normalize not supported on older firefox"
Revert "Normalize not supported on older firefox"

This reverts commit 487be80975ab0d36255d66d54cf51929374c8f53.

egh/zotero-better-bibtex,egh/zotero-better-bibtex,egh/zotero-better-bibtex,maxxk/zotero-better-bibtex,davepwsmith/zotero-better-bibtex,maxxk/zotero-better-bibtex,davepwsmith/zotero-better-bibtex,egh/zotero-better-bibtex,gracile-fr/zotero-better-bibtex,gracile-fr/zotero-better-bibtex,maxxk/zotero-better-bibtex