Da Vinci Tools brings handy enhancements to Google Analytics, Google Tag Manager, Google Ads and Data Studio.
Google Ads (aka AdWords):
▻ Table Heat Maps
▻ Go directly to UA Config Variable from a GA Tag
▻ Revert/Refund transactions or individual items 
▻ Remember the last report you were on
▻ Easily turn off tracking for the specified properties (for you only)
▻ Keep the report and table header at the top when scrolling
▻ Show view name in tab title
▻ Highlight high/low points in overview graphs
▻ Table heat map
▻ Simplified table comparison when using multiple data ranges
▻ Confidence Test calculator
▻ Create request for Reporting API v4, GSheet Addon or Supermetrics based on the current report settings
▻ Add several options to the date picker
▻ Handle pop-up link when Page is prefixed with Hostname using a filter
▻ Easily clear all segments to get back to "All Users"
▻ Pin a default segment instead of "All Users"
Google Tag Manager:
▻ Create a new Tag/Trigger/Variable from the Overview pane
▻ RegEx are validated for Trigger rules and RegEx Table Lookup Variables
▻ Search filters to display only Tags/Triggers/Variables
▻ Pause/Unpause tags directly from the Tags tab
▻ Inject your own GTM container on any page you want
▻ Easily copy/paste values from/to RegEx and Table Lookup variables
▻ Remember the last container you were on
▻ Remember your sorting preference for Overview, Tags, Triggers and Variables
▻ Make central table sticky & other UX improvements
▻ Easily turn off the specified container (for you only)
▻ Turn all built-in variables on/off at once
▻ Dark themed editor
▻ Show container name in tab title
▻ Highlight vars in code editor
▻ Sort fields, custom dimensions and metrics when editing a GA tag
▻ Tidy GTM Preview
▻ Exit GTM Preview easily from the Preview window
▻ Remember if GTM Preview was minimized or expanded when navigating
▻ Allow Ctrl-C/Right-Click Copy to copy selected code when in Preview Mode
▻ Automatically show sampling
▻ Auto-refresh the dashboard at the desired interval
Da Vinci Tools is another creation of Stéphane Hamel, the original author of the Web Analytics Solution Profiler (WASP) extension for tags auditing & debugging used by over 50,000 users.
 Those items requires access to your Google Analytics data.
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!