Fóram Tacaíochta Firefox

When I restarted my PC and opened Firefox only 1 tab Open previous windows and tabs. All the other 6 disappeared. I opened 3 additional tabs, closed Firefox, and reopened Firefox and only the one same tab was there from the previous session. Why does the feature not work properly?

Firefox 126 has changed the tabbar tab background handling and I cannot find a way to get my graphical tab background back for the selected tab. The left image shows FF 125.3; the left 126.0, which installed itself yesterday. In the userchrome for the old Firefox I have:

    #TabsToolbar:not(:-moz-lwtheme) .tabbrowser-tab .tab-content
 {
   background-image: url("file:///D:/System Graphics/Toolbar Backgrounds/rgsweeve - 000.bmp") !important;
 }
  #TabsToolbar:not(:-moz-lwtheme) .tabbrowser-tab .tab-content[selected="true"]
 {
   background-image: url("file:///D:/System Graphics/Toolbar Backgrounds/rgsweeve - 040.bmp") !important;
 }

This gave me the differentiated selected and unselected tabs but does not work for the selected tab in the new Firefox. Any ideas how I have to specify this now?

[I am making this post using the older version of Firefox. If I get some suggestions I'll reinstall the newer version (actually turn auto update back on) and try them out. Thanks.]

I'm switching to Firefox from Vivaldi since adblocking on YouTube no longer works on Chromium-based browsers, and Google is determined to annoy me even outside of Chrome (they also forced their material design context menus on everything else based on Chromium). However, I'm finding I'm missing the reading list functionality immediately. It has become a basic part of how I browse, and I attempted to use Pocket, but I'm finding that I hate how Pocket works compared to Vivaldi's reading list. Does anyone know of a good extension that emulates how Chromium-based browsers have their reading list, including working with sync so I can pass links between devices?