Allow user scripts for the new Firefox Reader facility about:reader

[cipriancraciun]

With the latest edition of Firefox, they have integrated the Pocket "reader", which when activated will load a "reading" version of the original page at an URL like about:reader?....

However user scripts are not allowed for about pages, including the about:reader.

I've made a small hack in modules/util/isGreasemonkeyable.js, by adding a line like the one below just after if (/^about:blank/.test(url)) return true;:

if (/^about:reader(\?.*)?$/.test(url)) return true;

[arantius]

I'll bet dollars to donuts that like other about: pages, it has chrome privileges, so it will never be greaseable.

[cipriancraciun]

I didn't say (although I wanted to) in my initial comment that I have zero knowledge about what my update implied. Perhaps it just opened a large security whole in my browser, but since I use only user scripts written by me, I am less concerned with potential security issues from my own scripts.

But, indeed a more knowledgeable person, in the inner workings of both Firefox and Grease Monkey, should look into this.

[arantius]

What exactly are the steps to launch such an about:reader page? I couldn't figure it out in the ~2 minutes I spent trying.

[cipriancraciun]

For example open the following link, and in the address bar, at the right, just before the reload button there is a small button like a book. Just press it.

http://getpocket.com/blog/2015/06/pocket-is-now-built-into-firefox/

(I guess you need the latest Firefox 38.0, and this feature works only on some pages like the one above.)

[arantius]

Oh, no about: shows in the UI in that case. But I'm clear what you're talking about and I can check what that context is.

[cipriancraciun]

Indeed the address bar still shows the original URL, but if you run inside the console document.URL, something like about:reader?... appears.

(I applied the patch described in the first comment and it works.)

[janekptacijarabaci]

e.g.
about:reader?url=http%3A%2F%2Fgetpocket.com%2Fblog%2F2015%2F06%2Fpocket-is-now-built-into-firefox%2F
about:reader?url=https%3A%2F%2Fsupport.mozilla.org%2Fcs%2Fquestions%2F1063000

[arantius]

This should be in 3.5beta1; let me know what you think:
https://addons.mozilla.org/firefox/downloads/file/354560/greasemonkey-3.5beta1-fx.xpi?src=devhub

[cipriancraciun]

Perfect. Works like a charm for reader URL's.

Thanks.