How to prevent translation of <title>?

I want to prevent translation for <title> element. But, this extension always translates <title>'s text content.

Env:

• Firefox 88.0
• Extension version: 8.9.3
• Language: Japanese

Reproduce Steps:

1. Install this extension
2. Visit https://github.com/FilipePS/Traduzir-paginas-web/issues
3. Click popup icon
4. Select translation language

As a result, this extension translated <title>.

tranlate attribute and notranslate class that is under the document.body seems to works. https://output.jsbin.com/pitelunayo But, <title translate="no"> does not work.

Context:

Sharing features like Twitter button refers to document.title. I do not want to share the translated title.

[azu]

In my opinion, the translator should check the element’s translate attribute before translate the element’s attribute like alt or placeholder.

For example, Google translates has checked the translate=no attribute before translating alt text. https://translate.google.com/translate?sl=auto&tl=ja&u=https://output.jsbin.com/gohurijocu

    <img alt="HELLO TEXT" src="" />  ← will be translated
    <input value="SUBMIT" type="submit" />  ← will be translated
    <hr>
    <h3>with translate=no</h3>
    <img alt="HELLO TEXT" src="" translate="no" />  ← will not be translated
    <input value="SUBMIT" type="submit" translate="no" /> ← will not be translated
    </body>

WHATWG HTML spec said that

The translate attribute is an enumerated attribute that is used to specify whether an element’s attribute values and the values of its Text node children are to be translated when the page is localized, or whether to leave them unchanged. https://html.spec.whatwg.org/multipage/dom.html#attr-translate

[azu]

Thanks!