I have been a longtime user of Firefox, which became my primary browser from its first release. At that time, it was a breath of fresh air after IE, which was slow, did not block pop-ups, and lacked tabs.
Firefox was the one to show how convenient it is to use tabs.
May I suggest to let the Firefox development team focus on Tab Grouping functionality and that you assign enough resources (UI designers, engineers, and testers) to this crucial feature? Other browsers (Chrome, Edge, Vivaldi…) already offer this functionality. It is essential for modern-day browsing in which people have tens or hundreds of tabs opened at the same time. On the Mozilla Connect portal, it is the no.
I have tried tab grouping in Chrome and Safari and can confidently say that Firefox, with the Sidebery extension, is capable of handling not just tens or hundreds, but thousands of tabs. Right now, I have 553 tabs open in my home browser and 300+ in my work browser. Yes, I use two browsers (Firefox and Firefox Developer Edition) to separate personal and work activities simply because I use multiple monitors, and this seemed more reliable than using multiple windows in Firefox.
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Groups in Chrome or Safari are not a separate container (in the terms of Firefox container). This means they do not solve the problem of accessing one site, like I have a site that does not support user switching, and I would have to constantly log out and log in to switch “context,” all open tabs can potentially “break,” for example, redirect to a 403 because the work user does not have access to the home user’s data. So, grouping in Chrome does not solve the problem of multiple accounts by itself.
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Pin tabs in Chrome are the same for all tab groups. In Safari and Sidebery, you can have separate pin tabs for each group.
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Vertical tabs are much better when you need to have hundreds of open tabs. They allow you to adjust the sidebar’s width for personal customization between the amount of visible characters and space used. Eye scanning with vertical scrolling is easier, as vertical scrolling is more natural, most of the time we scroll vertically!
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Groups of groups? When I created several groups in Chrome for testing, I found that they take up space by tabs, in Safari or Sidebery I can create hundreds of groups, in Chrome after 5–10 groups I need groups for groups.
Overall, I see that groups in Chrome are a solution for very basic grouping tasks up to about 100 tabs, and after that, they cease to be useful.
At the same time, opening tasks in Sidebery immediately gives me groups, as tabs automatically fall into the parent group (any tab can be group by itself), so I don’t need to make additional efforts to get a group with the research that spawned 30 tabs opened from the initial page.
Why I think Firefox Panorama failed, as did Groups in Chrome – they require explicit creation and management of groups.
Therefore, I do not see why Firefox needs “groups like in Chrome”, if you want groups, copy Safari, they are done much better there. And even better, copy Sidebery, it’s genuinely the best way to work with many tabs.