Yet as I'm sure many of you already know, enabling legacy add-ons in Firefox disables e10s. One of my favorite ways to sync bookmarks between different browsers that I love to use is Xmarks, but unfortunately it is not e10s compatible and it looks like it may never be. As an alternative to Xmarks, I can turn on Firefox Sync to keep my bookmarks synced across Firefox installations on all of my computers and my phone, but AFAIK this service will not sync with SeaMonkey. Please correct me if I'm mistaken about this. I've never tried the SeaMonkey Sync service. Based on what I've read, it looks like current Firefox Sync is incompatible with current SeaMonkey Sync.
Assuming that the Sync service will not work in between Firefox and SeaMonkey, I was thinking of alternatives or workarounds to Xmarks that I can use to keep all of my bookmarks in sync across all of my browsers and devices. I've come up with a couple of ideas.
One idea that I came up with is to keep separate profiles of Firefox on each of my computers: one profile with e10s enabled and without Xmarks, another profile with Xmarks and e10s disabled. I would then use Firefox Sync to keep the bookmarks between the profiles synced, and then use Xmarks on the one profile to sync with SeaMonkey. However, I have two major concerns about this solution.
- I'm very concerned that Xmarks and Firefox Sync will conflict and cause my bookmarks to go haywire. Back when I used to use Google Chrome, I recall very bad things would happen when I left the default Google sync on for bookmarks while Xmarks was enabled. Has anybody tried using Xmarks and Firefox sync with bookmark sync enabled at the same time that could comment on this being an issue? According to this support question, it looks like the same thing could happen.
- FWIU, once Firefox 57 is released, using Xmarks on a separate profile of Firefox will no longer work because Xmarks is not a web extension. Longer term I'm going to need a better solution, so I may want to figure that out now.
Also, if anybody else has a solution to my problem, I'd love to hear it.