Hi. I see the SVG image if I open this page in a Firefox tab.

Isn't that working for you?

Did you check this in the Web Console and in the Inspector?

• https://developer.mozilla.org/Tools/Page_Inspector
• https://developer.mozilla.org/Tools/Web_Console

cor-el сказал(а)

Hi. I see the SVG image if I open this page in a Firefox tab. Isn't that working for you? Did you check this in the Web Console and in the Inspector?

• https://developer.mozilla.org/Tools/Page_Inspector
• https://developer.mozilla.org/Tools/Web_Console

It isn't woking if i come to internfl page, like "cover" or "avatar".

OK.

I did some research and it appears to be caused by using the base tag.

<base href="http://vkprofi.ru/">

If you use the base tag the Firefox will looks for the ID in the wrong location (in a file on internet and not in the current document). <strike>The solution is to use the full path in the use tag.</strike>

In your case you can add the page path in front of the link:

<svg class="header-logo-svg" width="104" height="36">
  <use xlink:href="avatar/#svg-logo"></use>
</svg>

<svg class="svg-vk" width="33.25" height="19.25">
  <use xlink:href="avatar/#svg-vk"></use>
</svg>

See also:

• https://www.google.com/search?q=svg+symbol+use+base