This plugin already comes bundled in the OBS Studio Full Installer. You do not need to install this manually unless you did not install it via the Full installer.
This plugin allows you to add web pages as sources in OBS Multiplatform.

Here you can control Adobe Flash Player: it will open the Chrome flash player settings page where you can enable and disable the flash player globally or add exceptions (allow and block the flash plugin on specific sites). The new “components” page (which replaced the original plugins page some time ago) is also accessible here. Windows/ Mac: Video Player: Playback video clips: VSPlayerV7.4.2190128: Platinum Series: Windows/ Mac: Storage and Network Calculator: Caculate storage and bandwidth: CalculatorV1.0.1.2181101: Platinum Series: Windows/ Mac: Codec for Media Player: Codec for Windows Media Player: Platinum Series: Download: Web Component for IP Camera (Mac). IVMS-4500 for Mac is an extremely useful application if you want to have a CCTV surveillance camera network in your home or at the office. The app will make it easier to keep an eye on things with the help of the CCTV network. Besides this, the app will also provide a number of features.

1.0.6 (Stable)
Mac OS X
The Mac browser plugin comes with two variants:

• (Download Latest) 64bit plugin with 32bit CEF (Stable)
• (Download Latest) 64bit plugin with 64bit CEF (Experimental)

In reality both of these are similarly stable so 64/64 should work for most cases.
To install: Download the dmg and double click the 'OBS Browser Plugin Install.mpkg'.
Follow the instructions and then run OBS to start using it.
To uninstall: Double click the 'Uninstall' in the dmg.
Windows

• Download latest (v1.29 - 24-12-2016) changelog/older releases

To install: Extract to the root of your installation folder. For those that used the OBS Studio installer, that would be: C:Program Files (x86)obs-studio
Known problems:

• By default the plugin doesn't use any gpu acceleration due to it not working for everyone, this also means no WebGL support, if you really need that, start OBS Studio with the --enable-gpu argument.
• Https sites don't work: Usually this happens when using Kaspersky, make sure to put obs32 or obs64.exe on the whitelist.

Linux
There is not currently a Linux build of this browser plugin, but in the meantime bazukas has built another browser source based on qtwebkit. Details here: https://obsproject.com/forum/threads/browser-plugin.20358/page-2#post-133062
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If you would like to interact with a browser source then right click on the source item and select 'Interact'. This should then act like a very simple browser window.
When browsing for a local file, if you need to go into a .app file use cmd-shift-g or drag the directory onto the file browser.

Hikvision For Mac

Hikvision Live View Plugin

When looking at the properties of browser source you might notice 'Restart CEF'. This will restart the entire CEF isolated process in case it gets stuck or is not behaving correctly. Normally this should not be needed.