My initial question was "What determines if a page can or can't be displayed in Reader View in Firefox?" but I found the answer on a Webmasters StackExchange question here.

As far as I understand, sites that don't automatically show the option to enable Reader View have a problem with their code/tag/html/something. The Firefox support page for Reader View (here) suggests something similar: "If a page is available in Reader View, the Reader View icon will appear in the address bar".

My question now is, if Reader View icon doesn't appear,
Is there a way to force enable Reader View on such pages?

Visited this discussion on Reddit but it doesn't answer my question.

I considered posting this question in Software Recommendations but I'm not sure an addon will provide a solution. Maybe this can be done with a script or a Firefox setting in about:config or something else entirely?


Solution 1: The Best One

You can try installing Activate Reader View, an add-on for Firefox that will force reader view even if the icon is not displayed.

This add-on adds a button to the toolbar. Clicking on it will (force) activate Reader View even if the icon in the address bar is not present.

Technically this Add-on prepends "about:reader?url=" to the current tab's address.

Solution 2: Manual

Use Reader View on any site/webpage by adding below prefix to the url in the address bar:


For example, to view https://example.com/page1.html in Reader View,
enter about:reader?url=https://example.com/page1.html in the address bar and proceed.

Note: Doesn't work always.

Solution 3: For older version of Firefox

Install Pentadactyl add-on for firefox and create a custom command:

:command reader execute "open about:reader?url=" + content.location.href

And then you type :reader to get the Reader View.

You can also map a keyboard shortcut to your custom command like so...

:nmap :reader

A simple Ctrl + R will force Reader View.

Note: Pentadactyl is (probably) no longer in development. Last release was in March 15, 2014 and works with Firefox 24.0 - 31.*

  • Prepending about:reader?url= was the winner for me. I don't want to become dependent on extensions and none of the other answers worked. Feb 12 at 14:09

I added the following to my userChrome.css file:

#reader-mode-button { 
    display: -moz-box !important; 
    visibility: visible !important;

This makes the icon in the address (aka awesome) bar always be displayed. Clicking on it in a page that isn't an article probably won't work. But it ensures that I can go to reader mode quickly on any page where it does work.


OP asks:

My question now is, if Reader View icon doesn't appear,
Is there a way to force enable Reader View on such pages?

Another alternative is to use about:config, and then find this setting:


Set that to true, and you won't need any extensions or other trickery to get the reader-mode icon as desired.

  • This setting does not exist (anymore?)
    – phil294
    Jul 14 at 19:54
  • @phil294 - I just checked on latest FF 90.0 (64-bit) (on MacOS), and it's still there for me. :? It isn't so helpful, though, I've found. These days I use addons.mozilla.org/en-GB/firefox/addon/… (also available for Webkit browsers) which works beautifully and allows extra customization. Love it.
    – Dɑvïd
    Jul 16 at 10:27

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