Note: This is the EXACT same question as this, but for FireFox.
Is there a way to "force" the tab to think that it is in or out of focus, like toggle pseudo classes in Developer Tools, but for the entire tab.
I am running FireFox on Windows 10. I could not find a way to do this using Developer Tools, and do not want to setup a whole testing framework just for such a simple thing.
Thank you for your time.
In the Firefox DevTools this is not possible (as of Firefox 67), so I've created an enhancement request to add this feature.
I have just started using the Firefox Developer Tools. When I am in the Style Editor, I can't seem to grab the scrollbar thumb to scroll through my style sheets. I assume I'm missing something but can't find what. I have restarted the developer tools, and restarted Firefox, but that didn't help.
My cursor stays as if it is selecting text, even when I hover over the tiny scrollbar thumb, thus it doesn't let me grab the it. Obviously this is important as style sheets can have many lines!
I am using Firefox 50.1.0 currently.
This is a known bug filed as bug 1265807 .
A workaround for this is to switch to the Firebug theme, which uses the OS default scrollbars:
I am quite sure that with the good old Firebug, it was shown in the Layout tab, together with the box-sizing property.
Is it possible to tell in the Web Developer too? There is a Box Model tab which is quite similar to the Layout tab of Firebug, but it does not show this information.
Btw: I thought the built-in Web Developer was built on Firebug, but when reading about it it actually seems that they are two quite separate things.
That feature is currently only available in Firefox Nightly.
how to edit Firefox 'basic page style'
for all sites
with a Stylish script
to set scrollbar to a higher contrast color.
I can't see the thing its terrible.
is there any other way to do this?
The scrollbar is an operating system feature, not a feature of your website. Its look-and-feel are controlled by the user, not the webpage. IE provides a way to change scrollbar colors but it was heavily abused in the early days and is now considered a generally bad idea. In short, if you are trying to manipulate scrollbars from a webpage you're going to have to code a 'fake' scrollbar in Javascript or forget about it.
If you are trying to change only your own system then you may find some possibilities in creating user chrome, greasemonkey script or persona. I'm not sure what is possible there.
I am having my first foray into website design and I am learning a lot. I am also now seeing why web developers are not a huge fan of developing for Internet Explorer. Nothing seems to work how I expect. However, since the website has to work cross-browser, I am spending time looking at it in Firefox, Chrome, and IE. Something that is very non-obvious to me, however, is how to tell where problems lie in the website.
For example, the layout of one of my pages forces a footer to the bottom of the page. It looks great in Chrome and Firefox, but there's something broken in IE that make the footer align to the right (and cause a horizontal scroll to appear). I have played around with the code, but nothing really is responding to how I want in IE (even though it does in other browsers).
Are there any tools that can help "debug" the problems on a web site so fixing it is more than just a trial-and-error approach? Thanks.
One of my favorites that works in all browsers is X-Ray. You simply stick the link on that page into a bookmark and it loads some external JavaScript on top of the page you're testing. It reveals a bunch of parameters about the DOM object you click on, as well as its hierarchy in the model.
As for your specific footer problem, I would look to a potential lack of clearing of floats and divs that are wider than their parent containers somewhere up the line.
There are frameworks like GWT, ext-js, YUI which hide a lot of the browser bugs from you. But today (near the end of 2009), there still isn't a good, realiable way to narrow down browser issues and to fix them.
PS: I'm collecting tools that help during debugging here: Which tools do you use to debug HTML/JS in your browser?
I assume you have checked that your code is valid, with
HTML validator, for example: W3C Markup Validation Service
CSS checker, for example: W3C CSS Validation Service
And, of course, you should have correct doctype in your html file. Without doctype, some browsers go to quirks mode to emulate bugs in old browsers.
A cross-browser JavaScript library, like jQuery and its UI components, can be very helpful in avoiding idiosyncrasies between browsers. Microsoft provides the IE Developer Toolbar, it's not quite as easy to use as Firebug, but can still be very helpful. A Just-In-Time debugger like MS Script Debugger or Visual Studio are also a time saver.
I like Firebug for Firefox
and IE8 has Developer Tools from the tools menu and IE Developer Toolbar for older versions.
Chrome has similar tools from the page menu.
All of which allow you to see elements on the page as they are rendered in their specific browsers, which I usually find very helpful in debugging browser specific problems.