Algorithm choice screen is unreadable! Ohodnoceno 5 z 5 hvězdiček

After downloading I was presented with a table with options I could barely read - white text against a light blue background. So I dismissed the box and the user guide page was opened in a new browser tab, explaining the options - which I can setup via preferences in the extension window. I haven't got round to using the tool yet - but to be presented with options that weren't readable is off-putting! I'm not sure if this is specific to another extension I have enabled - e.g. no squint. But this was set to show black text against a white background as default. I disabled nosquint - but the html validator colors remained unreadable. So, assuming the colors have nothing to do with my existing extensions (even if they do?) - please could these choices be presented in a more readable way. Note: I don't have an array of extensions installed - nosquint, noscript, and newscrollbars only. So, seems unlikely they are to blame.


Thanks for the feedback.
Would it be possible to send by mail more details like OS, version of Firefox, the extension version and if possible screenshots of your issues
It seems that something is broken with new Firefox versions.

My mail is Thanks

Linux64 Ohodnoceno 5 z 5 hvězdiček

Using Linux64bit Firefox, didn't show up in the "View Page Source" tab, so I changed FF's behavior to open source in a new window (Set "" to "false" in about:config). Works again.

Version solved the issues! Ohodnoceno 5 z 5 hvězdiček

The new version its not only signed yet - it solved the issues with windows x64 systems on Firefox 42. I'm very happy that i can use it again. Thanks Marc!

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Useless - why advertise tool that does not work Ohodnoceno 1 z 5 hvězdiček

This tool suffers from developers lack of attention to detail. She (or he) does not care that browsers are updated often or need signing. Her lack of planning causes the addon to be blocked due to improper signing.

All responses from this developer blame Firefox - Never takes ownership of her lack of keeping up with rapid pace of releases.

Wake up! Release the source and let the community help you. You just need to ask for help with your good idea. (and don't tell us about how busy you are - software development is not for people who have time on their hands)

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The source is here : You are welcome to contribute :-)
I am currently looking for a way to compile the extension with Firefox on Windows 64 bits. But it is not working. Any help is welcome.


Not working Ohodnoceno 4 z 5 hvězdiček

The plugin worked great, but now it doesn't work at all. Changing the the algorithm didn't help.
I'm using FF 42.0.

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Please mail me ( with a screenshot, OS, and explanation of what does not work ? Note, Firefox Windows 64 bits is not supported yet. Please mail me if you use it, it seems that this version that was never used and discouraged is now used by a growing number of people.


Does not work in Firefox Developer 44.0a2 Ohodnoceno 5 z 5 hvězdiček

Love this tool.
It does not work in the new version for Firefox Developer 44.0a2.
Nothing happens when I click the link. The drop arrow will show the other options, but they do nothing too. Yours is the only tool I can use since I work on a vpn and need a validator that works local on my computer.

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Hi Steve,

Please read this.

In short, Electrosys is by default in 44a2. Mozilla dev team would like to disable the overlay of XUL... What will make impossible for an extension to modify the screen of Firefox.

Due that most extensions do this, most should be broken. And possibly impossible to redo with Electrosys.

In HTML Validator case, it would be then impossible to change the View Source page with the errors.....

Html Validator for Firefox 64bits on Windows Ohodnoceno 5 z 5 hvězdiček


Is this addon works with Firefox 64bits on Windows ? I try and the table in the source code window is empty


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Firefox Windows 64 bits

It has just never been compiled for Windows 64 bits. From what I know (6 month old) Firefox did not wish to have a 64 bits browser on Windows due to incompatibility with most Plugins ?

Where did you found out Firefox 64 bits. Just curious ?
Please respond to


Doesn't work on FF 40 Ohodnoceno 1 z 5 hvězdiček

If you want to waste about 10 minutes of your time, install this plug-in. Doesn't work.

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Please mail me

What did happen ? I do not know a case where it does not work. And it works for a lot of people with Firefox 40. I guess that you do not use the normal Firefox ? Please give screenshot and OS/browser version that you use exactly. Thanks.
Please answer to

Linux 64 Bit - I don't understand the answer Ohodnoceno 2 z 5 hvězdiček

what has a newer version for Windows to do with the missing Linux x86_64? i am using 64bit-only Systems and only Linux for at least 7 years now including that addon *but* for x86_64 you always needed to use the upstream version, no problem so far, but when signed addons get mandatory it becomes a serious problem

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Thanks for the headup. It worries me too. My answer was too small. I think it is best if you send me a mail.

In very short, there are several problems. Historically, I uploaded the Linux version here. But I stopped. There are several things that worries me:
1) Most people do not know if they run a 32 or 64 bit version of Firefox on Linux. And there is just Linux option in amo. No way to differentiate 32/64.
2) In the past, it did happen that the auto update did update automatically users of 32 bits with the 64 bit version and the opposite.
3) The time to review is huge. And I need to redo this 4 times. Uploading the extension failed 5/6 time when I submitted 0.962 windows version. I wait that this one is done before to redo it. Knowing that I will get issue because of 2 and 3

So, I have no good solution.
My idea today is to upload the 64 bit version here only ?
Any better idea is welcome.


Ps: I changed the code a little so that :
- the Linux version now contains the 32 and 64 bits library
- and detects the good library automatically.
- After that I have uploaded (08/09/2015) the Linux 32/64 bits and MacOSX on AMO to get signed.

My favorite Ohodnoceno 5 z 5 hvězdiček

For a long time there was a warning about the particular w3c API being deprecated, and now it no longer works at all.

Edit: dev fixed and made new release very quickly. 5 stars now.

This has been my long time favorite, especially when developing internal websites that the w3c validator cannot read directly. It's light and fast. What more could one want?

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Thanks for the feedback, I look at it...

(Update) Please use version 0.962 that you can find here:

! Not Local ! Ohodnoceno 3 z 5 hvězdiček

Works well - however be aware that validation IS NOT taking place locally.

A request containing page data is sent to W3C and can be observed when inspecting traffic (eg in fiddler). A big no no for secure environements.

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Not ready for it Ohodnoceno 3 z 5 hvězdiček

I don't feel it as my tool. I'm used to check errors online and there I can see all the messages in proper way. Here they are listed at the bottom and can't see all of them, yes there is a plus because when you click on a error/warning it shows you tha exact place of it but I can't say I got used to using it yet.

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Helpful Ohodnoceno 5 z 5 hvězdiček

Even if you don't rely on its entire functionality and windows, it's good because this extension shows you if your page is correct or not. You are aware of all the errors/warnings during coding so the result would be - better code writing and developing the skills and knowledge.

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Useful Ohodnoceno 5 z 5 hvězdiček

I use it every day. I like it, because if you forgot something you would find out what would be the mistake. That way you learn to code more efficient and probably won't need validator in the future. Another positive thing is that you can check either through the extension or use both online validators by passing the current page to them.

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Ohodnoceno 5 z 5 hvězdiček

It comes in great help for beginners in web developing.

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Great tool Ohodnoceno 5 z 5 hvězdiček

We can work more efficient using this checker.

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Ohodnoceno 5 z 5 hvězdiček

Very helpful HTML validator. I recommend to disable checking HTML for all pages to speed-up Firefox. You can check it in the code view (Ctrl + U).

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"Firefox 30 hangs" fix found Ohodnoceno 5 z 5 hvězdiček

Problem in the Firefox profile, subdir \tidy which contains the file 'spvalid.err'. Normally this file is zero bytes, with no data. The file had been 'restored' from another PC running a different o/s. Removed subdir \tidy, then re-installated Add-in which has repaired the issues and HTML Validator is now running as anticipated. Thanks to Marc for hint about Firefox profile.

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Don't appear on Add-on Bar Ohodnoceno 4 z 5 hvězdiček

I'ts a great tool. But, I have Firefox 29 and the icon don't appear on Add-on Bar.

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Firefox 29

Thanks for the feedback. You are the fisrt person to complain about it. And seen Firefox 29 is new. I would like to solve your problem asap. I have Firefox 29 on my machine but no issue.

Please do this:
- Click on the new menu toolbar of Firefox 29.
- At the bottom, click customize. Do you see the HTML Validator icon there ?
If yes, drag and drop it on the toolbar where it was.

- if not, right click on an empty space in the toolbar and click "customize..."
- the same list should show.

Whatever is the result, good or bad. Can you send me the result to my email "" ?
- please add the OS and OS version
- the version from which you upgraded or after which change that
the problem happened.
- also if possible screenshot of the issue if it is still there.


Ohodnoceno 5 z 5 hvězdiček

My son likes this. Says he can do his job better with it.

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