File extensions:

.htm and .html, graphics in JPG, PNG or GIF format. You can also set the extensions of your topic files to anything else required by your project in HTML Export Options (e.g. .php etc.).

Format:

A collection of HTML, graphics and other files in a directory, just like a website (it is a website)

Platforms:

All major computer platforms and browsers, including Mac and Linux

Browser compatibility:

The WebHelp output generated by Help+Manual is fully compatible with all major browsers. In addition to this the output will also work transparently on older and security-restricted browsers. It achieves this by automatically identifying browser capabilities and "downgrading gracefully", providing less dynamic and formatting features but still presenting a fully-functional help system.

Typical use:

Online help and documentation on the web or on local intranets where the use of HTML Help is not practical.

Table of contents:

Yes

Keyword index:

Yes

Full text search:

Yes (available in the Professional and Floating license versions of Help+Manual only)

Context-sensitive help:

Context calls from applications to topics and anchors in topics are supported. Field-level context popups displayed  within your applications are not supported.

Popups:

Yes, with JavaScript popups that are compatible with all current browsers and do not trigger popup blockers.

Multimedia:

Theoretically a wide range of video formats are supported, but whether they work or not depend on support for playing the formats used being installed on the user's computer. Also, the degree and quality of the support also depends on the support provided by the browser the user is using. So please test your output on all relevant browsers before distributing!

However, if you want guaranteed compatibility it is best to put your video on an online service like YouTube or Vimeo. Then they will automatically handle the compatibility issues by generating multiple versions of your video and serving up the correct one for the current user.

Printable by user:

Limited to browser print functions, which can generally only print individual topics.

Pros:

Platform and cross-browser compatible, ideal for help on the web and intranet systems. All the flexibility and formatting power of HTML, including the ability to add functions with JavaScript etc. by adding your own code to topics and templates.

Cons:

WebHelp consists of many individual HTML files, graphics and other files.