guideLinr provides rich, Photoshop-like guidelines for any page on the web.
With guideLinr, you can create vertical or horizontal guidelines that will persist by URL. If you visit Google today and add guides, tomorrow they'll be back when you return. Right click on any element to add guides on any edge (top, right, bottom, left, or all).
There are several different color options available, and the color of guides can be changed from the rich context menu available on each guide.
There is an integrated distance measurement tool that shows distance between your guides as you move them. The measurements are now sticky so you can see them wherever you scroll.
guideLinr guides can be dragged with your pointer, or moved with your arrow keys for more precise alignment. Hold Shift while you press arrow keys, and they move faster.
There's an optional "Snap to Element" feature to help align guides to your elements while dragging. There's also a "Snap To Grid" feature that helps create or align guides to a grid of your choosing.
The source for guideLinr is available here: https://bitbucket.org/slobaum/guidelinr/overview
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!