Firefox doesn't have a "text fragment finding" feature built-in, so the add-on is your best bet if you are exchanging those kinds of links with Chrome users. Or you are limited to traditional bookmarks that are linked to anchor locations set by the page author, such as element id's.

Since you mentioned a post in a thread specifically, usually there is a way to extract a permalink to a post/comment/reply. That might be from a menu or from the timestamp of the post (this varies from one forum to the next).

Note that this forum has a link to a specific reply as a link that shows the created time placed under the username, other forums probably have a way to get/bookmark a link to a specific reply

Since you mentioned a post in a thread specifically, usually there is a way to extract a permalink to a post/comment/reply. That might be from a menu or from the timestamp of the post (this varies from one forum to the next).

Note that this forum has a link to a specific reply as a link that shows the created time placed under the username, other forums probably have a way to get/bookmark a link to a specific reply

I tried googling this before posting, but maybe my phrasing wasn't effective. At best, I only have a vague notion of what you guys are referring to. Can you guide me with specific examples, or maybe there is tutorial somewhere?

How would it be done here? Is this what was referred to (image)? I tried right clicking on the date and selected "Bookmark Link". It brought me to the beginning of the thread.

You're probably familiar with this, but Github has certain threads that have 100's of posts on one page. So many that every time you visit there, they actually "hide" some posts under links disbursed randomly throughout the page. Every time you visit, you either have to sift thru the posts, or if you"re post was selected to be hidden, first you have to go on a scavenger hunt to find those links before even seeing if one of them is connected to your post.

I tried right clicking on the date and selected "Bookmark Link". It brought me to the beginning of the thread.

When you bookmark that link, it should include a hash that points to the specific post in the page:

https://support.mozilla.org/en-US/questions/1476804#answer-1691563

If you right-click the bookmark and use Edit Bookmark, is the hash missing?

noel_envode said

I tried right clicking on the date and selected "Bookmark Link". It brought me to the beginning of the thread.

When you bookmark that link, it should include a hash that points to the specific post in the page:

https://support.mozilla.org/en-US/questions/1476804#answer-1691563

If you right-click the bookmark and use Edit Bookmark, is the hash missing?

That's a huge help, great lesson.

Do you think it would also work for those hidden Github posts (please see my previous edited post)

You're probably familiar with this, but Github has certain threads that have 100's of posts on one page. So many that every time you visit there, they actually "hide" some posts under links disbursed randomly throughout the page. Every time you visit, you either have to sift thru the posts, or if you"re post was selected to be hidden, first you have to go on a scavenger hunt to find those links before even seeing if one of them is connected to your post.

Do you mean comments in Issues threads for a particular repository? Use the 3-got menu to Copy Link:

That isn't directly bookmarkable, you need to grab the link and then create the bookmark manually or navigate to the link address.