Bitbucket does not current offer a way to set the "Ignore Whitespace" setting as your default option when reviewing pull requests and commits. It's an incredibly useful option to have on when viewing side-by-side diffs but neither your Bitbucket account, nor browser local storage, will save you preference to enable it.
That's what this extension does - while enabled, any Bitbucket.org pull request or commit will have the "Ignore Whitespace" option enabled by default. This also applies to the "new PR experience" that Atlassian are rolling out via Bitbucket Labs.
Extore is a team of professionals who are passionate about creating extensions for web browsers. This devotion also gives us opportunity to appreciate work of other people. We get inspired by useful, open source extensions made by developers all over the world. Our strong belief is that one should share helpful add-ons with others. That’s why we’d like to present you our ever-growing list of favourite extensions that have inspired us. Moreover, as you probably have already learned, sometimes struggling for the best brings an end to the good. Talking about add-ons it often turns out that an upgrade is worse then previous version. Also it can become really tricky to get back to the beloved version of your favourite extension. That’s why we’re going to make not only the latest, but all versions of our favourite (and we hope yours too) add-ons available for download. No more compromises, just stick to the version you really like!