We've had numerous issues in PouchDB due to subtle differences between Webpack and Browserify:
- pouchdb/pouchdb#3647
- pouchdb/pouchdb#3319
- pouchdb/pouchdb#3287
- pouchdb/pouchdb#3787
- pouchdb/pouchdb#4700
- pouchdb/pouchdb#4709
To deal with this, we've started testing Webpack separately in CI (pouchdb/pouchdb#4701),
and we're probably going to start shipping one single index.js bundle to avoid end-user problems (pouchdb/pouchdb#4652).