Forum zhromadźenstwa Firefox

I am a Cacti developer and we are considering switching from FontAwesome Web Fonts to Tabler Web Fonts. However, on Firefox for Windows only, we are having a major slowdown when using the Tabler SVG based webfonts. The page load is first stalled by Firefox apparently loading all the Web Fonts, which would appear normal with any browser (though exceedingly slow on Firefox for some reason).

However, once the page is loaded, when going off tab to another browser tab, and then back to the Firefox tab that includes the Tabler webfonts, there is a 3 second delay before the tab switches. When we enable the performance analyzer, we find that the delay is almost 100% Reflow of the page, even though the page is static as this point (no changes) from the last time it was activated.

We do not have this issue on Firefox for Linux, MS Edge or any other Chromium browser, only Firefox on Windows. I'm using the latest version 134. Should I be opening a bug?

When I open Firefox I've lost my bookmarks (toolbar & others). When I try to refresh/troubleshoot Firefox I can't because the menu icon isn't responding .....

This happens when I click a link in an email or elsewhere. Firefox responds otherwise, I can open links within Firefox. It used to simply open the link in a new tab.

How can the previous behaviour be restored? so I can open a link in an existing FF window?