Firebug: No need to introduce more
https://chrome.google.com/webstore/detail/bmagokdooijbeehmkpknfglimnifench
ChromeSnifferPlus: Chrome detector, can detect the open source software or js library being used
https://chrome.google.com/webstore/detail/chrome-sniffer-plus/fhhdlnnepfjhlhilgmeepgkhjmhhhjkh
EyeDroper: Pick the color in the browser window, you can check the color code when you see the color you like, and save it for later use
https://chrome.google.com/webstore/detail/aonjhmdcgbgikgjapjckfkefpphjpgma
MeasureIt: Distance measurement in the browser window, used to measure the size of the element
https://chrome.google.com/webstore/detail/hmdcmlfkchdmnmnmheododdhjedfccka
Window Resizer: You can quickly adjust the size of the browser window to observe the width of the website page
https://chrome.google.com/webstore/detail/kkelicaakdanhinjdeammmilcgefonfh
Awesome Screenshot: Personally feel the best screenshot tool
https://chrome.google.com/webstore/detail/alelhddbbhepgpmgidjdcjakblofbmce
Ultimate Chrome Flag: Display the national flag of the region where the website is located in the address bar, as well as the RP value and alexa ranking
https://chrome.google.com/webstore/detail/dbpojpfdiliekbbiplijcphappgcgjfn
PageMonitor: page monitoring, if the content is updated, I will notify you. I used this plug-in to grab the iphone4 from the official Apple store. There are many places available. Pyong is used to monitor the revision of competitors...
https://chrome.google .com/webstore/detail/pemhgklkefakciniebenbfclihhmmfcd