• wait until the page is fully loaded: you may need to scroll down the entire page to be sure all elements are loaded
• click on the SingleFile button in the extension toolbar

Additional notes:

• You can select multiple tabs and save them by clicking on the SingleFile button .

You can customize the way SingleFile process a document through the options page. Right-click on SingleFile button in the browser toolbar and select "Options" in the context menu to open the options page.

Details :

• remove hidden elements

  Check this option to remove all hidden elements ( visibility = "hidden", or  display = "none", or  opacity = "0" CSS property values). This option may alter the document but can considerably reduce the size of the file.

  It is recommended to uncheck this option

• remove unused CSS rules

  Check this option to remove all CSS rules that do not match any element. This option may alter the document but can considerably reduce the size of the file. Checking this option may also introduce some incompatibilities issues in the saved page when opening it into another browser (i.e. not based on Chromium).

  It is recommended to uncheck this option

• Reset to default options

  Reset all the options to default state.

• all images are converted into base64
• resources are injected in the document using data URI scheme
• data URI scheme is supported by all modern browsers.

If you find an unknown issue (i.e. frozen process, extra saved files, blank or altered document, tab crash...):

• reset SingleFile options
• if resetting options did not work, try to disable all other extensions to see if there is a conflict
• if there is a conflict then try to determine against which extension(s)
• please report the issue here with a short description describing how to reproduce the issue, Browser version, OS name and version.