Can you please make it repeat the message while the tab is in front?

So happy I stumbled upon this, seeing it light up brings happy tears to my eyes. I actually wish I knew enough coding to create a version that just... continuously flashed, even if the website I was on didn't have overhead.

Bug report for the extension: on line 2 of gnu.js, "Document" should actually be "document". This is currently throwing an error and causing the html tag detection to fail. (And is causing me trouble in debugging something unrelated!)

Great extension and thanks for adding 57 support. I notice the license is GPL - is the code public?

The extension doesn't seem to react to html header anymore.

I would like to add my urging to somebody who can do it (which I can't) to update this essential add-on to be compatible with the latest version of Firefox. If I'd known that it would break, I wouldn't have allowed the update!

[Modified to add] Many thanks for your swift reply, Rob - I look forward to Mozilla approving and issuing your new version. I am so glad that people still care!

So please update this to keep him "alive" a bit longer in Firefox 57.
I really do like to see the flashing Clacks when visiting sites that have joined in with this.

I can only fall in line with the previous comments. Please update this addon for Firefox 57.

Let see which website is keeping Terry Pratchett alive "on the line".

As for further support, please make it compatible with multiprocess engine.

Been using this since March with no problems. it does not slow down or interfere with firefox when it's active & is a part of a nice ongoing tribute to Pterry

Works with test website shown and the graphics and speed is good (but speed is not adjustable.)
Does not seem to work if the http-equiv is included in a webpage header.

very nice addon to show a flag if X-Clacks-Overhead is set on a website.
like it!