為了改善您的使用體驗,本網站正在進行維護,部分功能暫時無法使用。若本站的文件無法解決您的問題,想要向社群發問的話,請到 Twitter 上的 @FirefoxSupport 或 Reddit 上的 /r/firefox 發問,我們的社群成員將很快會回覆您的疑問。

搜尋 Mozilla 技術支援網站

防止技術支援詐騙。我們絕對不會要求您撥打電話或發送簡訊,或是提供個人資訊。請用「回報濫用」功能回報可疑的行為。

了解更多

How to show browser widths in Firefox- is there an add-on / command to show browser widths when moving right side of screen

  • 4 回覆
  • 1 有這個問題
  • 10 次檢視
  • 最近回覆由 cor-el

more options

Does Firefox have the ability to show browser widths (px) when I am checking various browser width results in website design? Chrome has this in Developer tools - it displays as a little indicator at the top of the screen - but I don't want to resort to Google! I am aware of the developer tool in Firefox to set browser viewport size but this doesn't solve my problem. In responsive web design It is useful to move the right side of the browser in and out to check web design results dynamically (at different widths). Sorry if this has been answered elsewhere.

Does Firefox have the ability to show browser widths (px) when I am checking various browser width results in website design? Chrome has this in Developer tools - it displays as a little indicator at the top of the screen - but I don't want to resort to Google! I am aware of the developer tool in Firefox to set browser viewport size but this doesn't solve my problem. In responsive web design It is useful to move the right side of the browser in and out to check web design results dynamically (at different widths). Sorry if this has been answered elsewhere.

所有回覆 (4)

more options

Firefox has a Rulers feature that I think will do what you want. The button is not on the DevTools bar by default, you have to add it. For more info, see: https://developer.mozilla.org/docs/Tools/Rulers

Does that work for you?

more options

Thanks jscher2000! yes that’s what I needed. I had read about the rulers but was having trouble finding it. The only downsides of Firefox rulers tool seems to be that the rulers appear not to be persistent and always need the web console open. Am I right here? It seems that whenever Firefox is restarted the web console needs to be opened again and the rulers need to be “clicked” again. Is there a way to automatically keep the “rulers” active when Firefox starts? Your response somehow also led me on to an add-on, “Viewport” (extension) which is persistent and seems to solve my problem. Now there is an issue that “Viewport” and the Firefox “rulers” show slightly different pixel widths … I would prefer it if the Firefox Rulers was persistent. Anyway, thanks heaps for your help.

more options

Hi rayway, all I know is what I saw on MDN. I don't actually use it myself.

more options

There seem to be problems with the width of the scroll bar according to some comments: