i have a problem. I want a page to open in a Firefox Kiosk mode through a link on a website. I am creating a website for schoolchildren through which it should be possible to take exams. The test pages for this should only be opened in kiosk mode to prevent cheating.
I hope someone has an idea.
Greetings
Nothing inside a webpage can trigger Kiosk mode.
(It would be pretty awful if it was possible as any website could lock users into the browser and prevent them from quitting or using any other application!)
If you want to prevent students from using other applications (or webpages), then launch the browser in kiosk mode from the desktop.
If you want to prevent students from accessing data built into the webpage that would enable them to cheat (such as "This is the correct answer" values on checkboxes) then don't put that data into the page in the first place. Use tokens (such as "answer number 1") and resolve them server-side.
I am developing a chrome extension. When I install it one of its icon is displayed in address bar. I want that icon should not be displayed after installation.
Starting with Chrome 49 (see the announcement and detailed description) all extension icons are displayed in the browser toolbar:
[...] each extension the user has installed has a persistent UI surface. By default, this will be in the toolbar to the right of the omnibox (where browser actions are now), and the user can choose to hide ("overflow") these actions in the Chrome menu.
The reason for this is to protect our users. We've heard too frequently that many users are unaware of the extensions they have installed, whether this is due to sideloading, installation by phishing, or simply the user forgetting how many and which are installed. Unfortunately, extensions consume computing resources, and may have significant security, privacy, and performance impacts. Because of this, we've decided we need to increase user visibility.
What this means for your extension:
If the extension has a browser action: Nothing! (Apart from the slightly different hide/overflow functionality.)
If the extension has a page action: The extension will be given a persistent icon in the toolbar. On pages where the extension's page action wouldn't normally be visible, the action will be greyed out, indicating that it doesn't want to act. On pages it does want to act, it will be fully-colored.
If the extension has no action: Similar to page actions, the extension will be given a persistent icon in the toolbar. It will be shown with the greyed-out look all the time.
Displaying the action persistently, even in the cases of a previously hidden page action or an extension with no action, is necessary because the presence of an action doesn’t always correlate with the extension acting. We also can’t show the action conditionally on, e.g., a per-tab basis, because there are many actions that are not correlated with any tab. In order to ensure users are aware of the extensions they have installed that could be affecting their browser, we need to ensure each extension is visible.
We've done our best to limit the functionality this breaks, and hope you understand the trade-off between developer inconvenience and user benefit. Thank you for understanding as we keep our users safe!
An end user of your extension may manually hide the icon either by adjusting the overall toolbar width (click the space between addressbar and toolbar and drag) or by rightclicking an icon and selecting Hide or Show:
I am currently analysing my page connections and I want to block some tracking scripts and other external URL calls in my network monitor inside Chrome's developer tools.
I quickly want to check how the page behaves without some libraries.
Chrome itself does not provide any functions like this and the famous blocking extensions only block URLs which the user enters manually into the navigation bar.
As pointed out by #calavera.info, #iman.Bahrampour, and #Asim K T this feature is now available in Chrome 59. You can select a URL or domain to block in the Network panel. See this release note and these Screenshots where the StackOverflow logo has been blocked from this page. #iman.Bahrampour also shares two extensions below that will also do this ("HTTP Request Blocker" and "Request Blocker").
As abd3721 mentioned this is available directly within chrome DevTools (You don't need to be on canary anymore), however it is still behind a flag and in the hidden experimental features menu. As of the time of this comment, Chrome stable is on version 53.
To enable it, open this link and click the enable link under the appropriate flag:
chrome://flags/#enable-devtools-experiments
Then in DevTools open up the settings panel(F1) and click on the experiments tab.
This lists all currently available DevTools experiments but it is still in yet another hidden set of features.
Press Shift 6 times while in the experiments tab to show even more hidden features, one of them will be Request Blocking.
NOTE: These features are considered experimental and may be buggy or incomplete. Use with caution.
For blocking requests in google chrome you have 3 options:
1. Google Chrome with pattern matching:
In network tab, right click on request and then select block request URL
There is a plus sign that adds patterns for blocking requests
For example I have 7 request URLs:
http://www.test.com?userid=5
http://www.test.com?username=username
http://www.test.com?email=email
http://www.test.com?name=x
http://www.test.com?family=q
http://www.test.com?family=y
http://www.test.com?family=z
I can block requests that have a specific pattern by adding a pattern(for example the pattern *family* blocks 3 below requests):
http://www.test.com?family=q
http://www.test.com?family=y
http://www.test.com?family=z
Be careful! Because patterns are case sensitive
2. HTTP Request Blocker extension:
This extension has pattern matching for blocking requests:
Match patterns
3. Request blocker extension:
This is a useful extension that has pattern matching for blocking requests.
The most useful features of this request blocker are importing and exporting lists for using by other People.
For exporting a list and using in another computer(or future used): click on Direction down and select Export.
Open the exported list with import list button.
Good Luck
From Chrome 59 you can block specific requests from Network tab of developer tools itself.
https://developers.google.com/web/updates/2017/04/devtools-release-notes#block-requests
Right-click on the request in the Network panel and select Block Request URL. A new Request blocking tab pops up in the Drawer, which lets you manage blocked requests.
This is now achievable in Chrome 59 developer tools by blocking respective requests: https://developers.google.com/web/updates/2017/04/devtools-release-notes#block-requests. With this approach it is somehow difficult to turn off all the stylesheets, but it's easier to turn off just the most annoying ones.
As for Google Chrome 94, it's possible to exclude network activity for entire domain:
1. Go to "Network" panel of DevTools:
2. Rigth click on item of domain you want to block, click on "Block request domain" in the context menu:
3. Type "status-code:0" into "Filter" and click on "Invert" checkbox:
To manage blocked domains, press ESC button when in DevTools, and click on "Network request blocking" tab in the bottom panel:
Will changing host file help.
Your system (windows, linux, mac) all check host before requesting DNS lookup. I use it when I wan tot block some slow advertisers.
windows:
c:\Windows\system32\drivers\etc\hosts
linux & mac
/etc/hosts
* BE VERY CAREFUL TO MAKE BACK UPS *
An existing bug report is requesting this feature. You can star that issue to show support for it being added.
Well, i have been looking for an answer for this too, as I had this issue of choices by counterfeit, and nothing seemed to work for me.
But then I tried to analyze the requests and other things until I figured out, that there was this site which was loading ads onto my pages and redirecting me to advertisements. And also changing the google search bar on new tabs to some unknown search engine. I was able to temporarily block the request on one page. but after opening a new tab, the ads would appear again.
So googling for request blocker, I came up with a chrome extension "HTTP Request Blocker" and added the address which was causing all the crazy ads, has now solved the problem fully.
I hope it will be of help to you too or anyone else.
In the original question, the author states:
the famous blocking extensions only block URLs which the user enters manually into the navigation bar.
This is no longer the case. I have really enjoyed using mokku, which can intercept and mock all types of requests. You can specify what the status code should be, so it will definitely solve this problem as well as adding other functionality that is helpful. It works by another tab in the chrome dev tools. Here is a link to the extension: https://chrome.google.com/webstore/detail/mokku-mock-api-calls-seam/llflfcikklhgamfmnjkgpdadpmdplmji?hl=en
When we ask the user to allow us to use their Camera and Microphone the browser presents some sort of interface asking the user to accept or reject this action.
In Google Chrome this interface looks like this:
Our users seem to be missing the appearance of these Deny and Allow buttons.
Is there any cross browser utility that serves as "visual encouragement" for the user to click allow?
For instance, in the case of Google Chrome, something like a big yellow arrow would appear in the upper right of the page window and point at "Allow".
Agree that the default presentation in the major browsers leaves a lot to be desired. That pop-down menu bar is (typically) visually isolated from whatever the user clicked on to trigger the permission request. That is, their locus of attention is on an element that's disconnected from what they need to do next. This problem is exacerbated (1) by banner blindness (which means that people are used to ignoring animations in their peripheral vision, assuming that it's an ad) and (2) on larger screens.
So those are the issues causing the problem.
Here's a quick video walkthrough of one way to solve the problem by the site and by the browser itself, using Google Maps' "use my location" feature in the web browser:
http://cl.ly/2h2f382A143F/so-browserpermissions.m4v
I'm looking to build a chrome extension that allows the user to have an independent subwindow that is the same in each tab (for example you are taking notes and the notes are synchronized among each tab). Also, clicking a link should not destroy this subwindow.
One solution is to inject an iframe in each tab, and try to synchronize this data serverside and send back to each client tab, as it is updated.
This seems very tedious, plus the iframe would be provided by a third party, and I want to make it the easiest for them.
Is there a way I can have a shared dom piece and display it in its current state across several tabs?
There's an API (still experimental as of Chrome 17) that does more or less exactly what you want. If you visit about:flags, and enable "Panels" (they're enabled by default in Dev and on Canary (and on ChromeOS)), you'll be able to use chrome.windows.create with a type of panel to create a floating pane that exists independently from the browser window. That would likely meet your need.
Take a look at the Google Talk extension for an example of how it might work.