I have a plug-in that handles its own url schema (something like mystuf:// ). If a user clicks on such a link when the plug-in isn't installed (s)he gets an ugly error. So I extended my installer to write into the Registry (for Internet Explorer) and the user.js (for Firefox) to ADD a custom string to the user agent string. These additions survive a browser upgrade nicely (Microsoft uses this technique to indicate the presence of the dotNet Framework).
Now I need to extend this to Apple Safari and Google Chrome on all supported platforms.
To be clear: I'm not looking how to REPLACE the user agent string, but how to amend it with additional information.
Any hint?
I faced a similar problem and I implemented this in the same way as apple do for iTunes as described in this SO question. Finding information on how to create the Firefox plugin was more tricky, but the answer to my question was a great help. The Firefox (or mozilla) plugin will be used by all mozilla based browsers (Firefox, Chrome, Safari) and you will therefore be able to use the same javascript to detect the firefox plugin in all of these browsers and therefore determine whether your plugin/custom protocol/application is installed.
As Google Chrome supports the Netscape Plugin API ( http://en.wikipedia.org/wiki/NPAPI ), the Firefox way might be a good starting point also there.
Related
Is it possible to use SSO for PWAs for standalone display?
I can login to my app through email but if I try twitter/fb/google SSO, it opens to a new browser since they are out of the scope. This makes it pretty useless...
Is the only solution to just wrap the app?
The short answer is, SSO-inside-an-installed-PWA is broken on Chrome for Desktop as of Chrome 70 (November 2018).
The good news is, the W3C web.manifest standard has changed, and will no longer require browsers to open out-of-scope navigation in a separate window. This will fix the case of installed PWAs with single-sign-on authentication. This will be fixed in Chrome 71 on the desktop (due December 2018), and is already fixed on Chrome for Android.
Here's the update to the W3C web.manifest spec that details the change. In short, the spec says browsers must not block out-of-scope navigation inside an installed PWA. Instead, the spec encourages browsers to show some prominent UI (perhaps a bar at the top) notifying the user that the navigation is out-of-scope.
"Unlike previous versions of this specification, user agents are no
longer required or allowed to block off-scope navigations, or open
them in a new top-level browsing context. This practice broke a lot of
sites that navigate to a URL on another origin..."
How to search through all the ajax responses in network tab in Chrome?
I want to do this is because it is difficult for a JavaScript developer to get to know which information is coming from which service call, especially if you are new to the project and business logic is not clear. Also, opening each service in a network tab and searching in responses of so many service calls is difficult and time consuming.
This has now been implemented on the Network tab. Whenever a search criteria is added, Chrome will offer searching through all headers and bodies.
More from offical doc,
Open the Network panel then press Command+F (Mac) or Control+F (Windows, Linux, Chrome OS) to open the new Network Search pane.
This is similar to another question this morning to search json responses. The solution is the same, star this issue this issue. Starring is triggered via the star icon in the far left area of the blue title are just under search.
Starring issues let's the developers know what people need. The more stars something has, the more likely it is to get worked on sooner.
Currently this functionality is not provided and extensions are unable to add this type of functionality since the network panel isn't extensible in this way.
In Firefox you can save all the responses as a HAR file and then search through the file in a text editor (Chrome truncates the responses).
Inspector of Microsoft Edge browser offer such feature. Useful when you need to search through traffic made by an HTTPS web site that Fiddler cannot inspect (like Facebook web site).
There doesn't seem to be a way to do this in Chrome or Firefox. My solution has been to use Fiddler, which does support it.
Edit: I believe this was working for all resources at the time of writing, but please see comments because people say it is not/no-longer working as expected.
As of Chrome version 91, if you want to search through all resources (not just AJAX/fetched resources), then you need to open DevTools and then press Ctrl+Shift+F to open a search box. If you just type into the "filter" text input then it only searches through the URLs, rather than also searching the contents.
I am working on a web application that needs silent printing (without print dialog box) with client side printer.
After some research we found that we can make it work using ActiveX and Foxit Reader.
Currently it works great but it constraints us with IE only and we want to make it work with Firefox and Chrome as well.
I know there is no direct code to make it work, but there must a work around?
What I need is the point to start e.g. Chrome/Firefox plugins to access local printer - or make windows service that runs in background in the client side, change browser settings, use ActionScript etc.
It will also be great if someone also illustrate how Facebook access local webcam from its website it may make about accessing clients peripherals from website. Thanks in advance.
For anyone who still wants information regarding printing on Chrome and/or FireFox without the use of ActiveX, extensions or client-side scripting, please see my answer to another question similar to this.
I would like to know how the Chrome plugin "iReader" works. I would like to know what is the magic behind the detect the web page is enable "reader".Moreover, I would like to know how it extract the content of blog post. How can I inspect it?
Most Chrome plugins are open source so you can download them from the project's homepage. Besides, you can also open the Chrome Developer Tools and switch to script tag. There should be some scripts named "chrome-extension://".
The arbitrary string behind the "chrome-extension://" is the ID of the plugin. If you're using Windows Vista and above, refer to "C:\Users\${YOU USER NAME}\AppData\Local\Google\Chrome\User Data\Default\Extensions" to find out the ID of the "iReader".
I have a working Browser Helper Object (BHO) which is essentially an ATL based COM component. When the component is registered as a BHO in the Registry, the internet explorer calls the SetSite() method passing an object with an interface of IWebBrowser and it also exposes a set of events that can subscribed to - such as OnDocumentComplete, which gives us access to the InnerHTML.
I'm looking for something in the same lines for non IE browsers Firefox, Chrome and Safari. I know firefox extensions is where I should start
Is it possible to achieve the same using a cross browser SDK like NPAPI ? (Because each browser has its own SDK and extension development platform like cocoa, Pepper API etc. and in addtion most of them support NPAPI.)
How can I subscribe for events so that a SetSite() sort of function could be called by the browser when the user navigates to a different site ?
The answer to your first question is simple: no, it is not possible to do this with npapi. See http://npapi.com/extensions for more information about the difference between a Plugin (NPAPI) and an Extension. If there are things you can't do with the extension that you need to do (for example, that require C++ code to work) you could put those things in a NPAPI plugin and use it from your extension. If you decide to go that route I recommend looking at FireBreath.
As to the second, it will differ based on which browser you're writing the extension for; yes, it will need to be different for each browser. A quick google search for "firefox extension event page load" yielded a useful-looking doc.